Enhancing Ignitor API and fixing Exception handler content negotiation

• chore: update dependencies 8a952f3
• refactor(ignitor): move process.exit calls to top level function b232b4a
• fix: wait for error to print before exiting the process d425325
• fix(httpExceptionHandler): do content negotiation with html,json both 024d0d9

v2.1.0...v2.1.1