tsconfig.json

{
  "compileOnSave": false,
  "compilerOptions": {
    "allowUnreachableCode": false,
    "downlevelIteration": true,
    "importHelpers": false,
    "sourceMap": false,
    "inlineSources": false,
    "module": "es6",
    "moduleResolution": "node",
    "noEmitOnError": true,
    "noErrorTruncation": true,
    "allowSyntheticDefaultImports": true,
    "noFallthroughCasesInSwitch": true,
    "noImplicitAny": true,
    "noImplicitReturns": true,
    "noImplicitOverride": true,
    "noImplicitThis": true,
    "noImplicitUseStrict": true,
    "strict": false,
    "lib": ["es5", "ES2017"],
    "preserveConstEnums": false,
    "skipDefaultLibCheck": true,
    "strictBindCallApply": true,
    "strictFunctionTypes": true,
    "strictNullChecks": true,
    "strictPropertyInitialization": true,
    "stripInternal": true,
    "target": "es2015",
    "outDir": "tsc-out/",
    "types": ["jest"],
    "esModuleInterop": true
  },
  "include": ["./src/*.ts"]
}