Update Slate to 0.30.0

package.json

@@ -176,11 +176,11 @@
     "remark-stringify": "^3.0.1",
     "sanitize-filename": "^1.6.1",
     "semaphore": "^1.0.5",
-    "slate": "^0.29.0",
+    "slate": "^0.30.0",
     "slate-edit-list": "^0.10.1",
     "slate-edit-table": "^0.12.0",
-    "slate-plain-serializer": "^0.3.0",
-    "slate-react": "^0.9.0",
+    "slate-plain-serializer": "^0.4.0",
+    "slate-react": "^0.10.16",
     "slate-soft-break": "^0.6.0",
     "slug": "^0.9.1",
     "toml-j0.4": "^1.1.1",