Update npm/yarn dependencies

Replace deprecated babel-eslint with @babel/eslint-parser
Replace deprecated eslint-loader with eslint-webpack-plugin
Update other plugins, resolving several opened security reports.

Signed-off-by: Kevin Decherf <kevin@kdecherf.com>

.eslintrc.json

@@ -1,6 +1,6 @@
 {
     "extends": "airbnb-base",
-    "parser": "babel-eslint",
+    "parser": "@babel/eslint-parser",
     "env": {
         "browser": true,
         "es6": true