Fix types in CJS environments (#220)

Author: jevy

package.json

@@ -19,7 +19,11 @@
   "exports": {
     "./package.json": "./package.json",
     ".": {
-      "types": "./dist/src/index.d.ts",
+      "types": {
+        "import": "./dist/src/index.d.ts",
+        "require": "./dist/src/index.d.cts",
+        "default": "./dist/src/index.d.ts"
+      },
       "require": "./dist/src/index.cjs",
       "import": "./dist/src/index.js"
     }
@@ -33,7 +37,7 @@
     "buf": "buf generate && tsc-esm-fix --src src/authzedapi --ext='.js'",
     "lint": "./node_modules/.bin/eslint src",
     "build": "tsc",
-    "postbuild": "rollup dist/src/index.js --file dist/src/index.cjs --format cjs",
+    "postbuild": "rollup dist/src/index.js --file dist/src/index.cjs --format cjs && cp dist/src/index.d.ts dist/src/index.d.cts",
     "prepublish": "yarn build",
     "build-js-client": "tsc --declaration false --outDir js-dist"
   },