support esm and test in bun

.github/workflows/bun.yml

@@ -0,0 +1,18 @@
+name: Bun CI
+
+on:
+  push:
+    branches: [ "main" ]
+  pull_request:
+    branches: [ "main" ]
+
+jobs:
+  build:
+
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v3
+    - uses: oven-sh/setup-bun@v1
+    - run: bun install
+    - run: bun run test:bun

.github/workflows/node.js.yml

@@ -2,25 +2,25 @@ name: Node.js CI
 
 on:
   push:
-    branches: [ master ]
+    branches: [ main ]
   pull_request:
-    branches: [ master ]
+    branches: [ main ]
 
 jobs:
   build:
 
-    runs-on: ${{ matrix.os }}
+    runs-on: ubuntu-latest
 
     strategy:
       matrix:
-        os: [ubuntu-latest]
-        node-version: [8.x, 20.x]
+        node-version: [12.x, 20.x]
 
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v3
     - name: Use Node.js ${{ matrix.node-version }}
-      uses: actions/setup-node@v1
+      uses: actions/setup-node@v3
       with:
         node-version: ${{ matrix.node-version }}
+        cache: 'npm'
     - run: npm i
     - run: npm test

.gitignore

@@ -1,4 +1,4 @@
-.vscode/settings.json
+.vscode/
 node_modules/
-index.js*
-index.d.ts
+cjs
+*.tgz

.npmignore

@@ -1,5 +1,4 @@
 .*
 node_modules/
-package-locak.json
 test.ts
-index.ts
+*.tgz

esm/package.json

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

index.ts

@@ -19,13 +19,16 @@ export function applyMagic<T extends new (...args: any[]) => any>(ctor: T, ctx?:
 export function applyMagic<T extends (...args: any[]) => any>(fn: T, proxyOnly: boolean): T;
 export function applyMagic<T extends object>(obj: T): T;
 export function applyMagic(target: any, ctx: boolean | object = false) {
-    if (typeof target == "function") {
+    if (typeof target === "function") {
         if (ctx === true) {
             return proxify(target);
         }
 
         const PseudoClass = function PseudoClass(this: any, ...args: any[]) {
-            if (typeof this == "undefined") { // function call
+            // Must use `new.target` instead of `this`, because in ES Module
+            // system, `this` will reference to the `globalThis` if not provided
+            // by `Function.call()`.
+            if (typeof new.target === "undefined") { // function call
                 let invoke = target[__invoke] || target["__invoke"];
 
                 if (invoke) { // use static __invoke