ESM fixes

• ESM build specific fixes:
  • Added .js extensions for all relative imports (using tsc-esm-fix)
  • Use lodash-es
  • json5 imports now ESM compatible
  • ESM compatible peer dependency dynamic loading (yaml, dotenv, properties-reader)
• Use tsx for running tests
• Added package.json exports (browser-index.ts) which excludes Node.js functions
• dependency updates