tsconfig.json

{
  "compilerOptions": {
    "allowJs": false,
    "allowSyntheticDefaultImports": true,
    "allowUnreachableCode": false,
    "allowUnusedLabels": false,
    "alwaysStrict": true,
    "charset": "utf8",
    "checkJs": false,
    "declaration": false,
    "disableSizeLimit": false,
    "downlevelIteration": false,
    "emitBOM": false,
    "emitDecoratorMetadata": true,
    "esModuleInterop": true,
    "experimentalDecorators": true,
    "forceConsistentCasingInFileNames": true,
    "importHelpers": false,
    "inlineSourceMap": false,
    "inlineSources": false,
    "isolatedModules": false,
    "lib": [
      "es2017",
      "esnext.asynciterable"
    ],
    "locale": "en-us",
    "module": "commonjs",
    "moduleResolution": "node",
    "newLine": "lf",
    "noEmit": false,
    "noEmitHelpers": false,
    "noEmitOnError": true,
    "noErrorTruncation": true,
    "noFallthroughCasesInSwitch": true,
    "noImplicitAny": true,
    "noImplicitReturns": true,
    "noImplicitThis": true,
    "noStrictGenericChecks": false,
    "noUnusedLocals": true,
    "noUnusedParameters": false,
    "noImplicitUseStrict": false,
    "noLib": false,
    "noResolve": false,
    "preserveConstEnums": false,
    "removeComments": false,
    "skipLibCheck": true,
    "sourceMap": true,
    "strict": true,
    "strictNullChecks": true,
    "suppressExcessPropertyErrors": false,
    "suppressImplicitAnyIndexErrors": false,
    "target": "es2017",
    "traceResolution": false,
    "typeRoots": [
      "src/custom-typings",
      "node_modules/@types"
    ]
  }
}