fix: update module system and test configuration for ESM support

Co-Authored-By: Michael Latman <[email protected]>

jest.config.js

@@ -7,8 +7,14 @@ module.exports = {
   moduleFileExtensions: ['ts', 'js', 'json', 'node'],
   setupFilesAfterEnv: ['<rootDir>/src/__tests__/setup.ts'],
   transform: {
-    '^.+\\.tsx?$': ['ts-jest']
+    '^.+\\.tsx?$': ['ts-jest', {
+      useESM: true
+    }]
   },
+  moduleNameMapper: {
+    '^(\\.{1,2}/.*)\\.js$': '$1'
+  },
+  extensionsToTreatAsEsm: ['.ts'],
   collectCoverage: true,
   coverageDirectory: 'coverage',
   coverageReporters: ['text', 'lcov'],

package.json

@@ -9,11 +9,11 @@
     "test": "jest --coverage",
     "test:watch": "jest --watch",
     "test:coverage": "jest --coverage",
-    "test:list": "node src/index.ts list",
-    "test:install": "node src/index.ts install",
-    "test:installed": "node src/index.ts installed",
-    "extract": "node src/extractors/modelcontextprotocol-extractor.ts",
-    "test:uninstall": "node src/index.ts uninstall",
+    "test:list": "node --loader ts-node/esm src/index.ts list",
+    "test:install": "node --loader ts-node/esm src/index.ts install",
+    "test:installed": "node --loader ts-node/esm src/index.ts installed",
+    "extract": "node --loader ts-node/esm src/extractors/modelcontextprotocol-extractor.ts",
+    "test:uninstall": "node --loader ts-node/esm src/index.ts uninstall",
     "version:patch": "npm version patch",
     "version:minor": "npm version minor",
     "version:major": "npm version major",
@@ -54,11 +54,10 @@
     "packages",
     "LICENSE"
   ],
-  "type": "commonjs",
+  "type": "module",
   "exports": {
     ".": {
-      "import": "./dist/index.js",
-      "require": "./dist/index.js"
+      "import": "./dist/index.js"
     }
   },
   "license": "MIT"

tsconfig.json

@@ -1,8 +1,8 @@
 {
   "compilerOptions": {
-    "target": "ES2020",
-    "module": "ES2020",
-    "moduleResolution": "node",
+    "target": "ES2022",
+    "module": "node16",
+    "moduleResolution": "node16",
     "esModuleInterop": true,
     "strict": true,
     "skipLibCheck": true,