Fix eslint warnings, update eslint config

package.json

@@ -4,11 +4,11 @@
   "dependencies": {
     "@rails/webpacker": "^4.0.7",
     "axios": "^0.19.0",
-    "bourbon": "~4.2.7",
     "babel-helper-vue-jsx-merge-props": "^2.0.3",
     "babel-plugin-syntax-jsx": "^6.18.0",
     "babel-plugin-transform-vue-jsx": "^3.7.0",
     "babel-preset-env": "^1.7.0",
+    "bourbon": "~4.2.7",
     "chart.js": "~2.5.0",
     "dotenv": "^8.0.0",
     "emojione": "~2.2.7",
@@ -74,6 +74,6 @@
     ]
   },
   "scripts": {
-    "eslint": "eslint app/javascript"
+    "eslint": "eslint app/javascript --fix"
   }
 }