build: enable eslint, again

.eslintrc.json

@@ -1,9 +1,9 @@
 {
+  "parser": "babel-eslint",
   "env": {
     "browser": true,
     "commonjs": true,
-    "es6": true,
-    "node": true
+    "es6": true
   },
   "parserOptions": {
     "ecmaFeatures": {
@@ -12,15 +12,24 @@
     "sourceType": "module"
   },
   "rules": {
+    "strict": 0,
     "no-const-assign": "warn",
-    "no-this-before-super": "warn",
-    "no-undef": "warn",
+    "no-this-before-super": "error",
+    "no-undef": "error",
     "no-unreachable": "warn",
     "no-unused-vars": "warn",
     "constructor-super": "warn",
-    "valid-typeof": "warn"
+    "react/jsx-uses-vars": 1,
+    "valid-typeof": "warn",
+    "babel/new-cap": 1,
+    "babel/no-invalid-this": 1,
+    "babel/object-curly-spacing": 0,
+    "babel/quotes": 0,
+    "babel/semi": 0,
+    "babel/no-unused-expressions": 1
   },
   "plugins": [
-    "class-property"
+    "babel",
+    "react"
   ]
 }

package.json

@@ -19,6 +19,7 @@
   },
   "devDependencies": {
     "babel-core": "^6.26.0",
+    "babel-eslint": "^8.2.3",
     "babel-loader": "^7.1.2",
     "babel-plugin-react-require": "^3.0.0",
     "babel-plugin-transform-class-properties": "^6.24.1",
@@ -27,6 +28,10 @@
     "babel-preset-react": "^6.24.1",
     "copy-webpack-plugin": "^4.2.0",
     "css-loader": "^0.28.7",
+    "eslint": "^4.19.1",
+    "eslint-plugin-babel": "^5.1.0",
+    "eslint-plugin-class-property": "^1.1.0",
+    "eslint-plugin-react": "^7.9.1",
     "file-loader": "^1.1.5",
     "less": "^2.7.3",
     "less-loader": "^4.0.5",