tsconfig.base.json

{
  "compilerOptions": {
    "allowSyntheticDefaultImports": true,
    "declaration": true,
    "esModuleInterop": true,
    "experimentalDecorators": true,
    "forceConsistentCasingInFileNames": true,
    "importsNotUsedAsValues": "error",
    "incremental": true,
    "resolveJsonModule": true,
    "importHelpers": true,
    "moduleResolution": "node",
    "noEmit": false,
    "noFallthroughCasesInSwitch": true /* Report errors for fallthrough cases in switch statement. */,
    "noImplicitAny": true /* Raise error on expressions and declarations with an implied 'any' type. */,
    "noImplicitReturns": true /* Report error when not all code paths in function return a value. */,
    "noUnusedLocals": false /* Report errors on unused locals. */,
    "noUnusedParameters": false /* Report errors on unused parameters. */,
    "skipLibCheck": true,
    "sourceMap": true,
    "strict": false,
    "strictFunctionTypes": true /* Enable strict checking of function types. */,
    "strictNullChecks": true /* Enable strict null checks. */,
    "target": "es5",
    "typeRoots": ["node_modules/@types", "node_modules/jest"],
    "types": ["node", "jest"],
    "jsx": "preserve",
    "lib": ["dom", "esnext"],
    "module": "esnext"
  }
}