refactor(core): use esm in core (#681)

packages/core/package.json

@@ -5,6 +5,7 @@
   "main": "build/index.js",
   "author": "Silverhand Inc. <contact@silverhand.io>",
   "license": "MPL-2.0",
+  "type": "module",
   "private": true,
   "scripts": {
     "preinstall": "npx only-allow pnpm",

packages/core/tsconfig.json

@@ -5,10 +5,16 @@
       "node",
       "jest",
       "jest-matcher-specific-error"
-    ]
+    ],
+    "module": "ESNext"
   },
   "include": [
     "src",
     "jest.*.ts"
-  ]
+  ],
+  "ts-node": {
+    "moduleTypes": {
+      "jest.config.ts": "cjs"
+    }
+  }
 }

packages/jest-config/jest.config.ts

@@ -5,7 +5,7 @@ const baseConfig: Config.InitialOptions = Object.freeze({
   preset: 'ts-jest',
   transform: {
     // Enable JS/JSX transformation
-    '\\.(ts|js)x?$': 'ts-jest',
+    '\\.(ts)x?$': 'ts-jest',
     '\\.(svg)$': 'jest-transform-stub',
   },
   transformIgnorePatterns: [