Use babel-preset-env instead of the yearly presets.

This allows only the transpilation needed for the supported browsers to
be done. It also allows us to use the upgrades from ES2016 and ES2017
without needing to add a seperate preset.

.babelrc

@@ -1,5 +1,5 @@
 {
-  "presets": [["es2015", { "modules": false }], "stage-1", "react"],
+  "presets": [["env", { "modules": false }], "stage-1", "react"],
   "plugins": [
     "react-hot-loader/babel",
     "lodash",

package.json

@@ -83,7 +83,7 @@
     "babel-loader": "^7.0.0",
     "babel-plugin-lodash": "^3.2.0",
     "babel-plugin-transform-builtin-extend": "^1.1.0",
-    "babel-preset-es2015": "^6.22.0",
+    "babel-preset-env": "^1.6.0",
     "babel-preset-react": "^6.23.0",
     "babel-preset-stage-1": "^6.22.0",
     "babel-runtime": "^6.23.0",

yarn.lock

@@ -740,7 +740,7 @@ babel-plugin-transform-async-generator-functions@^6.24.1:
     babel-plugin-syntax-async-generators "^6.5.0"
     babel-runtime "^6.22.0"
 
-babel-plugin-transform-async-to-generator@^6.24.1:
+babel-plugin-transform-async-to-generator@^6.22.0, babel-plugin-transform-async-to-generator@^6.24.1:
   version "6.24.1"
   resolved "https://registry.yarnpkg.com/babel-plugin-transform-async-to-generator/-/babel-plugin-transform-async-to-generator-6.24.1.tgz#6536e378aff6cb1d5517ac0e40eb3e9fc8d08761"
   dependencies:
@@ -801,7 +801,7 @@ babel-plugin-transform-es2015-block-scoped-functions@^6.22.0:
   dependencies:
     babel-runtime "^6.22.0"
 
-babel-plugin-transform-es2015-block-scoping@^6.24.1:
+babel-plugin-transform-es2015-block-scoping@^6.23.0, babel-plugin-transform-es2015-block-scoping@^6.24.1:
   version "6.26.0"
   resolved "https://registry.yarnpkg.com/babel-plugin-transform-es2015-block-scoping/-/babel-plugin-transform-es2015-block-scoping-6.26.0.tgz#d70f5299c1308d05c12f463813b0a09e73b1895f"
   dependencies:
@@ -811,7 +811,7 @@ babel-plugin-transform-es2015-block-scoping@^6.24.1:
     babel-types "^6.26.0"
     lodash "^4.17.4"
 
-babel-plugin-transform-es2015-classes@^6.24.1:
+babel-plugin-transform-es2015-classes@^6.23.0, babel-plugin-transform-es2015-classes@^6.24.1:
   version "6.24.1"
   resolved "https://registry.yarnpkg.com/babel-plugin-transform-es2015-classes/-/babel-plugin-transform-es2015-classes-6.24.1.tgz#5a4c58a50c9c9461e564b4b2a3bfabc97a2584db"
   dependencies:
@@ -825,33 +825,33 @@ babel-plugin-transform-es2015-classes@^6.24.1:
     babel-traverse "^6.24.1"
     babel-types "^6.24.1"
 
-babel-plugin-transform-es2015-computed-properties@^6.24.1:
+babel-plugin-transform-es2015-computed-properties@^6.22.0, babel-plugin-transform-es2015-computed-properties@^6.24.1:
   version "6.24.1"
   resolved "https://registry.yarnpkg.com/babel-plugin-transform-es2015-computed-properties/-/babel-plugin-transform-es2015-computed-properties-6.24.1.tgz#6fe2a8d16895d5634f4cd999b6d3480a308159b3"
   dependencies:
     babel-runtime "^6.22.0"
     babel-template "^6.24.1"
 
-babel-plugin-transform-es2015-destructuring@^6.22.0:
+babel-plugin-transform-es2015-destructuring@^6.22.0, babel-plugin-transform-es2015-destructuring@^6.23.0:
   version "6.23.0"
   resolved "https://registry.yarnpkg.com/babel-plugin-transform-es2015-destructuring/-/babel-plugin-transform-es2015-destructuring-6.23.0.tgz#997bb1f1ab967f682d2b0876fe358d60e765c56d"
   dependencies:
     babel-runtime "^6.22.0"
 
-babel-plugin-transform-es2015-duplicate-keys@^6.24.1:
+babel-plugin-transform-es2015-duplicate-keys@^6.22.0, babel-plugin-transform-es2015-duplicate-keys@^6.24.1:
   version "6.24.1"
   resolved "https://registry.yarnpkg.com/babel-plugin-transform-es2015-duplicate-keys/-/babel-plugin-transform-es2015-duplicate-keys-6.24.1.tgz#73eb3d310ca969e3ef9ec91c53741a6f1576423e"
   dependencies:
     babel-runtime "^6.22.0"
     babel-types "^6.24.1"
 
-babel-plugin-transform-es2015-for-of@^6.22.0:
+babel-plugin-transform-es2015-for-of@^6.22.0, babel-plugin-transform-es2015-for-of@^6.23.0:
   version "6.23.0"
   resolved "https://registry.yarnpkg.com/babel-plugin-transform-es2015-for-of/-/babel-plugin-transform-es2015-for-of-6.23.0.tgz#f47c95b2b613df1d3ecc2fdb7573623c75248691"
   dependencies:
     babel-runtime "^6.22.0"
 
-babel-plugin-transform-es2015-function-name@^6.24.1:
+babel-plugin-transform-es2015-function-name@^6.22.0, babel-plugin-transform-es2015-function-name@^6.24.1:
   version "6.24.1"
   resolved "https://registry.yarnpkg.com/babel-plugin-transform-es2015-function-name/-/babel-plugin-transform-es2015-function-name-6.24.1.tgz#834c89853bc36b1af0f3a4c5dbaa94fd8eacaa8b"
   dependencies:
@@ -865,7 +865,7 @@ babel-plugin-transform-es2015-literals@^6.22.0:
   dependencies:
     babel-runtime "^6.22.0"
 
-babel-plugin-transform-es2015-modules-amd@^6.24.1:
+babel-plugin-transform-es2015-modules-amd@^6.22.0, babel-plugin-transform-es2015-modules-amd@^6.24.1:
   version "6.24.1"
   resolved "https://registry.yarnpkg.com/babel-plugin-transform-es2015-modules-amd/-/babel-plugin-transform-es2015-modules-amd-6.24.1.tgz#3b3e54017239842d6d19c3011c4bd2f00a00d154"
   dependencies:
@@ -873,7 +873,7 @@ babel-plugin-transform-es2015-modules-amd@^6.24.1:
     babel-runtime "^6.22.0"
     babel-template "^6.24.1"
 
-babel-plugin-transform-es2015-modules-commonjs@^6.24.1:
+babel-plugin-transform-es2015-modules-commonjs@^6.23.0, babel-plugin-transform-es2015-modules-commonjs@^6.24.1:
   version "6.26.0"
   resolved "https://registry.yarnpkg.com/babel-plugin-transform-es2015-modules-commonjs/-/babel-plugin-transform-es2015-modules-commonjs-6.26.0.tgz#0d8394029b7dc6abe1a97ef181e00758dd2e5d8a"
   dependencies:
@@ -882,7 +882,7 @@ babel-plugin-transform-es2015-modules-commonjs@^6.24.1:
     babel-template "^6.26.0"
     babel-types "^6.26.0"
 
-babel-plugin-transform-es2015-modules-systemjs@^6.24.1:
+babel-plugin-transform-es2015-modules-systemjs@^6.23.0, babel-plugin-transform-es2015-modules-systemjs@^6.24.1:
   version "6.24.1"
   resolved "https://registry.yarnpkg.com/babel-plugin-transform-es2015-modules-systemjs/-/babel-plugin-transform-es2015-modules-systemjs-6.24.1.tgz#ff89a142b9119a906195f5f106ecf305d9407d23"
   dependencies:
@@ -890,7 +890,7 @@ babel-plugin-transform-es2015-modules-systemjs@^6.24.1:
     babel-runtime "^6.22.0"
     babel-template "^6.24.1"
 
-babel-plugin-transform-es2015-modules-umd@^6.24.1:
+babel-plugin-transform-es2015-modules-umd@^6.23.0, babel-plugin-transform-es2015-modules-umd@^6.24.1:
   version "6.24.1"
   resolved "https://registry.yarnpkg.com/babel-plugin-transform-es2015-modules-umd/-/babel-plugin-transform-es2015-modules-umd-6.24.1.tgz#ac997e6285cd18ed6176adb607d602344ad38468"
   dependencies:
@@ -898,14 +898,14 @@ babel-plugin-transform-es2015-modules-umd@^6.24.1:
     babel-runtime "^6.22.0"
     babel-template "^6.24.1"
 
-babel-plugin-transform-es2015-object-super@^6.24.1:
+babel-plugin-transform-es2015-object-super@^6.22.0, babel-plugin-transform-es2015-object-super@^6.24.1:
   version "6.24.1"
   resolved "https://registry.yarnpkg.com/babel-plugin-transform-es2015-object-super/-/babel-plugin-transform-es2015-object-super-6.24.1.tgz#24cef69ae21cb83a7f8603dad021f572eb278f8d"
   dependencies:
     babel-helper-replace-supers "^6.24.1"
     babel-runtime "^6.22.0"
 
-babel-plugin-transform-es2015-parameters@^6.24.1:
+babel-plugin-transform-es2015-parameters@^6.23.0, babel-plugin-transform-es2015-parameters@^6.24.1:
   version "6.24.1"
   resolved "https://registry.yarnpkg.com/babel-plugin-transform-es2015-parameters/-/babel-plugin-transform-es2015-parameters-6.24.1.tgz#57ac351ab49caf14a97cd13b09f66fdf0a625f2b"
   dependencies:
@@ -916,7 +916,7 @@ babel-plugin-transform-es2015-parameters@^6.24.1:
     babel-traverse "^6.24.1"
     babel-types "^6.24.1"
 
-babel-plugin-transform-es2015-shorthand-properties@^6.24.1:
+babel-plugin-transform-es2015-shorthand-properties@^6.22.0, babel-plugin-transform-es2015-shorthand-properties@^6.24.1:
   version "6.24.1"
   resolved "https://registry.yarnpkg.com/babel-plugin-transform-es2015-shorthand-properties/-/babel-plugin-transform-es2015-shorthand-properties-6.24.1.tgz#24f875d6721c87661bbd99a4622e51f14de38aa0"
   dependencies:
@@ -929,7 +929,7 @@ babel-plugin-transform-es2015-spread@^6.22.0:
   dependencies:
     babel-runtime "^6.22.0"
 
-babel-plugin-transform-es2015-sticky-regex@^6.24.1:
+babel-plugin-transform-es2015-sticky-regex@^6.22.0, babel-plugin-transform-es2015-sticky-regex@^6.24.1:
   version "6.24.1"
   resolved "https://registry.yarnpkg.com/babel-plugin-transform-es2015-sticky-regex/-/babel-plugin-transform-es2015-sticky-regex-6.24.1.tgz#00c1cdb1aca71112cdf0cf6126c2ed6b457ccdbc"
   dependencies:
@@ -943,13 +943,13 @@ babel-plugin-transform-es2015-template-literals@^6.22.0:
   dependencies:
     babel-runtime "^6.22.0"
 
-babel-plugin-transform-es2015-typeof-symbol@^6.22.0:
+babel-plugin-transform-es2015-typeof-symbol@^6.22.0, babel-plugin-transform-es2015-typeof-symbol@^6.23.0:
   version "6.23.0"
   resolved "https://registry.yarnpkg.com/babel-plugin-transform-es2015-typeof-symbol/-/babel-plugin-transform-es2015-typeof-symbol-6.23.0.tgz#dec09f1cddff94b52ac73d505c84df59dcceb372"
   dependencies:
     babel-runtime "^6.22.0"
 
-babel-plugin-transform-es2015-unicode-regex@^6.24.1:
+babel-plugin-transform-es2015-unicode-regex@^6.22.0, babel-plugin-transform-es2015-unicode-regex@^6.24.1:
   version "6.24.1"
   resolved "https://registry.yarnpkg.com/babel-plugin-transform-es2015-unicode-regex/-/babel-plugin-transform-es2015-unicode-regex-6.24.1.tgz#d38b12f42ea7323f729387f18a7c5ae1faeb35e9"
   dependencies:
@@ -957,7 +957,7 @@ babel-plugin-transform-es2015-unicode-regex@^6.24.1:
     babel-runtime "^6.22.0"
     regexpu-core "^2.0.0"
 
-babel-plugin-transform-exponentiation-operator@^6.24.1:
+babel-plugin-transform-exponentiation-operator@^6.22.0, babel-plugin-transform-exponentiation-operator@^6.24.1:
   version "6.24.1"
   resolved "https://registry.yarnpkg.com/babel-plugin-transform-exponentiation-operator/-/babel-plugin-transform-exponentiation-operator-6.24.1.tgz#2ab0c9c7f3098fa48907772bb813fe41e8de3a0e"
   dependencies:
@@ -1021,7 +1021,7 @@ babel-plugin-transform-react-jsx@^6.24.1:
     babel-plugin-syntax-jsx "^6.8.0"
     babel-runtime "^6.22.0"
 
-babel-plugin-transform-regenerator@^6.24.1:
+babel-plugin-transform-regenerator@^6.22.0, babel-plugin-transform-regenerator@^6.24.1:
   version "6.26.0"
   resolved "https://registry.yarnpkg.com/babel-plugin-transform-regenerator/-/babel-plugin-transform-regenerator-6.26.0.tgz#e0703696fbde27f0a3efcacf8b4dca2f7b3a8f2f"
   dependencies:
@@ -1042,7 +1042,42 @@ babel-polyfill@^6.26.0, babel-polyfill@^6.9.1:
     core-js "^2.5.0"
     regenerator-runtime "^0.10.5"
 
-babel-preset-es2015@^6.22.0, babel-preset-es2015@^6.9.0:
+babel-preset-env@^1.6.0:
+  version "1.6.0"
+  resolved "https://registry.yarnpkg.com/babel-preset-env/-/babel-preset-env-1.6.0.tgz#2de1c782a780a0a5d605d199c957596da43c44e4"
+  dependencies:
+    babel-plugin-check-es2015-constants "^6.22.0"
+    babel-plugin-syntax-trailing-function-commas "^6.22.0"
+    babel-plugin-transform-async-to-generator "^6.22.0"
+    babel-plugin-transform-es2015-arrow-functions "^6.22.0"
+    babel-plugin-transform-es2015-block-scoped-functions "^6.22.0"
+    babel-plugin-transform-es2015-block-scoping "^6.23.0"
+    babel-plugin-transform-es2015-classes "^6.23.0"
+    babel-plugin-transform-es2015-computed-properties "^6.22.0"
+    babel-plugin-transform-es2015-destructuring "^6.23.0"
+    babel-plugin-transform-es2015-duplicate-keys "^6.22.0"
+    babel-plugin-transform-es2015-for-of "^6.23.0"
+    babel-plugin-transform-es2015-function-name "^6.22.0"
+    babel-plugin-transform-es2015-literals "^6.22.0"
+    babel-plugin-transform-es2015-modules-amd "^6.22.0"
+    babel-plugin-transform-es2015-modules-commonjs "^6.23.0"
+    babel-plugin-transform-es2015-modules-systemjs "^6.23.0"
+    babel-plugin-transform-es2015-modules-umd "^6.23.0"
+    babel-plugin-transform-es2015-object-super "^6.22.0"
+    babel-plugin-transform-es2015-parameters "^6.23.0"
+    babel-plugin-transform-es2015-shorthand-properties "^6.22.0"
+    babel-plugin-transform-es2015-spread "^6.22.0"
+    babel-plugin-transform-es2015-sticky-regex "^6.22.0"
+    babel-plugin-transform-es2015-template-literals "^6.22.0"
+    babel-plugin-transform-es2015-typeof-symbol "^6.23.0"
+    babel-plugin-transform-es2015-unicode-regex "^6.22.0"
+    babel-plugin-transform-exponentiation-operator "^6.22.0"
+    babel-plugin-transform-regenerator "^6.22.0"
+    browserslist "^2.1.2"
+    invariant "^2.2.2"
+    semver "^5.3.0"
+
+babel-preset-es2015@^6.9.0:
   version "6.24.1"
   resolved "https://registry.yarnpkg.com/babel-preset-es2015/-/babel-preset-es2015-6.24.1.tgz#d44050d6bc2c9feea702aaf38d727a0210538939"
   dependencies:
@@ -1400,7 +1435,7 @@ browserslist@^1.1.1, browserslist@^1.1.3, browserslist@^1.3.6, browserslist@^1.5
     caniuse-db "^1.0.30000639"
     electron-to-chromium "^1.2.7"
 
-browserslist@^2.0.0, browserslist@^2.5.0:
+browserslist@^2.0.0, browserslist@^2.1.2, browserslist@^2.5.0:
   version "2.5.1"
   resolved "https://registry.yarnpkg.com/browserslist/-/browserslist-2.5.1.tgz#68e4bc536bbcc6086d62843a2ffccea8396821c6"
   dependencies: