Use eslint config from the js sdk

Extend the js sdk's eslint config to give as consistent a code
style as possible. Add react/jsx/flow stuff that we use here.

package.json

@@ -74,7 +74,7 @@
   "devDependencies": {
     "babel-cli": "^6.5.2",
     "babel-core": "^6.14.0",
-    "babel-eslint": "^6.1.0",
+    "babel-eslint": "^6.1.2",
     "babel-loader": "^6.2.5",
     "babel-plugin-add-module-exports": "^0.2.1",
     "babel-plugin-transform-async-to-generator": "^6.16.0",
@@ -86,9 +86,10 @@
     "babel-preset-es2016": "^6.11.3",
     "babel-preset-es2017": "^6.14.0",
     "babel-preset-react": "^6.11.1",
-    "eslint": "^2.13.1",
-    "eslint-plugin-flowtype": "^2.17.0",
-    "eslint-plugin-react": "^6.2.1",
+    "eslint": "^3.13.1",
+    "eslint-config-google": "^0.7.1",
+    "eslint-plugin-flowtype": "^2.30.0",
+    "eslint-plugin-react": "^6.9.0",
     "expect": "^1.16.0",
     "json-loader": "^0.5.3",
     "karma": "^0.13.22",