Convert project to ESM and update dependencies (#854)

- Switch to esbuild for bundling
- Update npm dependency version
- Add require header for compat with older JS libs

sources/jest.config.js

@@ -1,16 +1,20 @@
-const develocityReporter = require.resolve('@gradle-tech/develocity-agent/jest-reporter');
+import {createRequire} from 'node:module'
 
-module.exports = {
+const require = createRequire(import.meta.url)
+const develocityReporter = require.resolve('@gradle-tech/develocity-agent/jest-reporter')
+
+export default {
   clearMocks: true,
   moduleFileExtensions: ['js', 'ts', 'json'],
   testEnvironment: 'node',
   testMatch: ['**/*.test.ts'],
+  extensionsToTreatAsEsm: ['.ts'],
   transform: {
-    '^.+\\.ts$': 'ts-jest'
+    '^.+\\.ts$': ['ts-jest', { useESM: true }]
   },
   reporters: [
-      'default',
-      develocityReporter
+    'default',
+    develocityReporter
   ],
   verbose: true
 }