Changed

• Remove the sub-process spawning behaviour that introduced issues with 4.x
  • Use node -r ts-node/register for advanced node.js flags such as --inspect
• Drop support for pre-2.0 TypeScript releases
• Use TypeScript to parse tsconfig.json to mirror tsc behaviours
  • Caveat: Must specify full path when using project in 5.x

Fixed

• Fixed issues with CLI and environment variable defaults