refactor: rename source files extension to .ts (#219)

.eslintrc.json

@@ -4,7 +4,7 @@
   "extends": ["eslint:recommended"],
   "overrides": [
     {
-      "files": ["**/*.?([cm])ts"],
+      "files": ["**/*.ts"],
       "extends": ["plugin:@typescript-eslint/recommended"]
     }
   ]

.gitignore

@@ -5,4 +5,4 @@
 build/
 node_modules/
 
-src/**/*.mjs
+src/**/*.js

action.yaml

@@ -52,4 +52,4 @@ outputs:
     value: ${{ steps.process-inputs.outputs.build-dir }}
 runs:
   using: node20
-  main: dist/index.mjs
+  main: dist/index.js

dist/package.json

@@ -0,0 +1,3 @@
+{
+  "type": "module"
+}

package.json

@@ -2,7 +2,7 @@
   "private": true,
   "type": "module",
   "scripts": {
-    "build": "tsc && ncc build src/index.mjs -o dist",
+    "build": "tsc && ncc build src/index.js -o dist",
     "format": "prettier --write --cache . !dist !README.md",
     "lint": "eslint --ignore-path .gitignore ."
   },