feat!: drop CJS build, now it's ESM-only

Author: antfu

build.config.ts

@@ -6,7 +6,4 @@ export default defineBuildConfig({
   ],
   declaration: true,
   clean: true,
-  rollup: {
-    emitCJS: true,
-  },
 })

package.json

@@ -20,20 +20,16 @@
   ],
   "sideEffects": false,
   "exports": {
-    ".": {
-      "types": "./dist/index.d.ts",
-      "import": "./dist/index.mjs",
-      "require": "./dist/index.cjs"
-    }
+    ".": "./dist/index.mjs"
   },
   "main": "./dist/index.mjs",
   "module": "./dist/index.mjs",
-  "types": "./dist/index.d.ts",
+  "types": "./dist/index.d.mts",
   "typesVersions": {
     "*": {
       "*": [
         "./dist/*",
-        "./dist/index.d.ts"
+        "./dist/index.d.mts"
       ]
     }
   },