[Typescript] Enforcing Code Quality

tsconfig.json:

{
  "compilerOptions": {
    "target": "es5",
    "lib": ["es6", "dom"],
    "module": "commonjs",
    "outDir": "dist",
    "noUnusedLocals": true,
    "noUnusedParameters": true,
    "noFallthroughCasesInSwitch": true,
    "noImplicitReturns": true
  }
}