switch to ESM and update config/test wiring

Signed-off-by: CrazyMax <1951866+crazy-max@users.noreply.github.com>

jest.config.itg.cjs

@@ -0,0 +1,38 @@
+/**
+ * Copyright 2023 actions-toolkit authors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+module.exports = {
+  testEnvironment: 'node',
+  moduleFileExtensions: ['js', 'ts'],
+  setupFiles: ['dotenv/config'],
+  testMatch: ['**/*.test.itg.ts'],
+  testTimeout: 1800000, // 30 minutes
+  transform: {
+    '^.+\\.ts$': [
+      'ts-jest',
+      {
+        useESM: true
+      }
+    ]
+  },
+  moduleNameMapper: {
+    '^csv-parse/sync': '<rootDir>/node_modules/csv-parse/dist/cjs/sync.cjs',
+    '^(\\.{1,2}/.*)\\.js$': '$1'
+  },
+  extensionsToTreatAsEsm: ['.ts'],
+  testResultsProcessor: '<rootDir>/__tests__/testResultsProcessor.cjs',
+  verbose: false
+};