tsconfig.json

{
    "compilerOptions": {
      "declaration": true,
      "lib": ["es2018"],
      "target": "es2018",
      "module": "commonjs",
      "moduleResolution": "node",
      "noEmitOnError": true,
      "noFallthroughCasesInSwitch": true,
      "noImplicitReturns": true,
      "noImplicitOverride": true,
      "noUnusedLocals": false,
      "noUnusedParameters": false,
      "pretty": true,
      "removeComments": false,
      "sourceMap": true,
      "outDir": "build",
      "allowJs": false,
      "skipLibCheck": false,
      "esModuleInterop": true,
      "allowSyntheticDefaultImports": true,
      "strict": true,
      "forceConsistentCasingInFileNames": true,
      "resolveJsonModule": true,
      "useUnknownInCatchVariables": false,
      "isolatedModules": true,
      "rootDir": "src"
    },
    "include": ["src/**/*"]
  }