chore: add JS boilerplate code from Flarum CLI

js/package.json

@@ -1,19 +1,23 @@
 {
-    "private": true,
   "name": "@blomstra/realtime",
+  "private": true,
+  "version": "0.0.0",
+  "prettier": "@flarum/prettier-config",
   "dependencies": {
     "flarum-webpack-config": "^1.0.0",
-        "lodash-es": "^4.17.14",
     "pusher-js": "^7.0.3",
-        "webpack": "^4.43.0",
+    "webpack": "^4.46.0",
-        "webpack-cli": "^3.3.11"
+    "webpack-cli": "^4.9.0",
+    "@flarum/prettier-config": "^1.0.0",
+    "flarum-tsconfig": "^1.0.2"
   },
   "scripts": {
     "dev": "webpack --mode development --watch",
     "build": "webpack --mode production",
-        "lint": "prettier --single-quote --trailing-comma es5 --print-width 150 --tab-width 4 --write src"
+    "format": "prettier --write src",
+    "format-check": "prettier --check src"
   },
   "devDependencies": {
-        "prettier": "^2.3.1"
+    "prettier": "^2.4.1"
   }
 }

js/tsconfig.json

@@ -0,0 +1,16 @@
+{
+  // Use Flarum's tsconfig as a starting point
+  "extends": "flarum-tsconfig",
+  // This will match all .ts, .tsx, .d.ts, .js, .jsx files in your `src` folder
+  // and also tells your Typescript server to read core's global typings for
+  // access to `dayjs` and `$` in the global namespace.
+  "include": ["src/**/*", "../vendor/flarum/core/js/dist-typings/@types/**/*"],
+  "compilerOptions": {
+    // This will output typings to `dist-typings`
+    "declarationDir": "./dist-typings",
+    "baseUrl": ".",
+    "paths": {
+      "flarum/*": ["../vendor/flarum/core/js/dist-typings/*"]
+    }
+  }
+}