chore: migrate to esm (#334)

* chore: update unit tests

* fix: follow latest action template

* chore: add licenses and workflows

* chore: remove bloat

* chore: fix linter

jest.config.js

@@ -1,9 +1,40 @@
-module.exports = {
+// See: https://jestjs.io/docs/configuration
+
+/** @type {import('ts-jest').JestConfigWithTsJest} **/
+export default {
   clearMocks: true,
-  moduleFileExtensions: ['js', 'ts'],
+  collectCoverage: true,
+  collectCoverageFrom: ['./src/**'],
+  coverageDirectory: './coverage',
+  coveragePathIgnorePatterns: ['/node_modules/', '/dist/'],
+  coverageReporters: ['json-summary', 'text', 'lcov'],
+  // Uncomment the below lines if you would like to enforce a coverage threshold
+  // for your action. This will fail the build if the coverage is below the
+  // specified thresholds.
+  // coverageThreshold: {
+  //   global: {
+  //     branches: 100,
+  //     functions: 100,
+  //     lines: 100,
+  //     statements: 100
+  //   }
+  // },
+  extensionsToTreatAsEsm: ['.ts'],
+  moduleFileExtensions: ['ts', 'js'],
+  preset: 'ts-jest',
+  reporters: ['default'],
+  resolver: 'ts-jest-resolver',
+  testEnvironment: 'node',
   testMatch: ['**/*.test.ts'],
+  testPathIgnorePatterns: ['/dist/', '/node_modules/'],
   transform: {
-    '^.+\\.ts$': 'ts-jest'
+    '^.+\\.ts$': [
+      'ts-jest',
+      {
+        tsconfig: 'tsconfig.eslint.json',
+        useESM: true
+      }
+    ]
   },
   verbose: true
 }