feat: add ESLint as a githook

.lintstagedrc

@@ -1,7 +1,10 @@
 {
   "linters": {
-    "src/**/*.js": [
+    "src/**/*.{js,jsx,scss,json}": [
       "prettier --write",
+      "git add"
+    ],
+    "src/**/*.{js,jsx}": [
       "eslint --fix",
       "git add"
     ]

package.json

@@ -61,7 +61,7 @@
     "electron-builder": "^19.49.0",
     "electron-devtools-installer": "^2.2.1",
     "electron-webpack": "^1.11.0",
-    "eslint": "^4.13.1",
+    "eslint": "^4.19.1",
     "eslint-config-airbnb": "^16.1.0",
     "eslint-config-prettier": "^2.9.0",
     "eslint-import-resolver-webpack": "^0.8.3",