tsconfig.json

{
  "compilerOptions": {
    "noEmit": true,
    "noEmitOnError": true,
    "pretty": true,
    "target": "es2017",
    "module": "commonjs",
    "lib": ["es2018", "esnext.asynciterable"],
    "declaration": true,
    "sourceMap": true,
    "suppressImplicitAnyIndexErrors": true,

    /* Strict Type-Checking Options */
    "strict": true,
    "strictPropertyInitialization": false, /* TypeORM entities use properties w/o initialization, so we need to turn this off */

    /* Additional Checks */
    "noUnusedLocals": true,                /* Report errors on unused locals. */
    "noUnusedParameters": false,           /* Report errors on unused parameters. */
    "noImplicitReturns": true,             /* Report error when not all code paths in function return a value. */
    "noFallthroughCasesInSwitch": true,    /* Report errors for fallthrough cases in switch statement. */
    "forceConsistentCasingInFileNames": true,

    /* Module Resolution Options */
    "moduleResolution": "node",            /* Specify module resolution strategy: 'node' (Node.js) or 'classic' (TypeScript pre-1.6). */
    "allowSyntheticDefaultImports": true,  /* Allow default imports from modules with no default export. This does not affect code emit, just typechecking. */
    "esModuleInterop": true,

    /* Experimental Options */
    "experimentalDecorators": true,        /* Enables experimental support for ES7 decorators. */
    "emitDecoratorMetadata": true          /* Enables experimental support for emitting type metadata for decorators. */
  },
  "include": [
    "src/**/*",
    "tests/**/*"
  ]
}