fix(deps): update dependency js-base64 to v3 (#4277)

Co-authored-by: Renovate Bot <bot@renovateapp.com>

packages/netlify-cms-backend-bitbucket/package.json

@@ -21,7 +21,7 @@
   },
   "dependencies": {
     "common-tags": "^1.8.0",
-    "js-base64": "^2.5.1",
+    "js-base64": "^3.0.0",
     "semaphore": "^1.1.0",
     "what-the-diff": "^0.6.0"
   },

packages/netlify-cms-backend-github/package.json

@@ -28,7 +28,7 @@
     "common-tags": "^1.8.0",
     "graphql": "^15.0.0",
     "graphql-tag": "^2.10.1",
-    "js-base64": "^2.5.1",
+    "js-base64": "^3.0.0",
     "semaphore": "^1.1.0"
   },
   "peerDependencies": {

packages/netlify-cms-backend-gitlab/package.json

@@ -20,7 +20,7 @@
     "build:esm": "cross-env NODE_ENV=esm babel src --out-dir dist/esm --ignore \"**/__tests__\" --root-mode upward --extensions \".js,.jsx,.ts,.tsx\""
   },
   "dependencies": {
-    "js-base64": "^2.5.1",
+    "js-base64": "^3.0.0",
     "semaphore": "^1.1.0"
   },
   "peerDependencies": {

packages/netlify-cms-core/package.json

@@ -37,7 +37,7 @@
     "gray-matter": "^4.0.2",
     "history": "^4.7.2",
     "immer": "^3.1.3",
-    "js-base64": "^2.5.1",
+    "js-base64": "^3.0.0",
     "jwt-decode": "^2.1.0",
     "node-polyglot": "^2.3.0",
     "prop-types": "^15.7.2",