Bump ESLint & related deps (#782)

* Bump eslint & related deps

* Fix lint errors

* Add eslint-config-prettier

Author: jhen0409

.eslintrc

@@ -1,6 +1,6 @@
 {
-  "parser": "babel-eslint",
-  "extends": "airbnb",
+  "parser": "@babel/eslint-parser",
+  "extends": ["airbnb", "prettier"],
   "env": {
     "browser": true,
     "node": true,
@@ -33,6 +33,7 @@
     ],
     "react/jsx-filename-extension": [1, { "extensions": [".js", ".jsx"] }],
     "import/prefer-default-export": 0,
-    "import/no-extraneous-dependencies": ["error", { "optionalDependencies": true }]
+    "import/no-extraneous-dependencies": ["error", { "optionalDependencies": true }],
+    "semi": ["error", "never"]
   }
 }

.prettierrc

@@ -1,7 +1,7 @@
 {
   "trailingComma": "all",
   "tabWidth": 2,
-  "semi": true,
+  "semi": false,
   "singleQuote": true,
   "printWidth": 80
 }