[1.0] Drop CJS build and export types first (#235)

* Export types first

* Drop CJS build

* Remove CJS build step

* Use `"type": "module"` in the project

* Remove `mjs` extension from build output

* Fix ESLint configuration which does not support ESM

---------

Co-authored-by: Tim MacDonald <hello@timacdonald.me>

package.json

@@ -14,16 +14,15 @@
     },
     "license": "MIT",
     "author": "Laravel",
+    "type": "module",
     "exports": {
         ".": {
-            "import": "./dist/index.mjs",
-            "require": "./dist/index.cjs",
-            "types": "./dist/index.d.ts"
+            "types": "./dist/index.d.ts",
+            "default": "./dist/index.js"
         },
         "./inertia-helpers": {
-            "import": "./inertia-helpers/index.js",
             "types": "./inertia-helpers/index.d.ts",
-            "node": "./inertia-helpers/index.js"
+            "default": "./inertia-helpers/index.js"
         }
     },
     "types": "./dist/index.d.ts",
@@ -33,10 +32,9 @@
     ],
     "scripts": {
         "build": "npm run build-plugin && npm run build-inertia-helpers",
-        "build-plugin": "rm -rf dist && npm run build-plugin-types && npm run build-plugin-esm && npm run build-plugin-cjs && cp src/dev-server-index.html dist/",
+        "build-plugin": "rm -rf dist && npm run build-plugin-types && npm run build-plugin-esm && cp src/dev-server-index.html dist/",
         "build-plugin-types": "tsc --emitDeclarationOnly",
-        "build-plugin-cjs": "esbuild src/index.ts --platform=node --format=cjs --outfile=dist/index.cjs --define:import.meta.url=import_meta_url --inject:./import.meta.url-polyfill.js",
-        "build-plugin-esm": "esbuild src/index.ts --platform=node --format=esm --outfile=dist/index.mjs",
+        "build-plugin-esm": "esbuild src/index.ts --platform=node --format=esm --outfile=dist/index.js",
         "build-inertia-helpers": "rm -rf inertia-helpers && tsc --project tsconfig.inertia-helpers.json",
         "lint": "eslint --ext .ts ./src ./tests",
         "test": "vitest run"