tsconfig.json

{
  "include": ["src/**/*"],
  "exclude": ["node_modules", "**/__tests__/*"],
  "compilerOptions": {
    "outDir": "lib/",
    "resolveJsonModule": true,
    "declaration": true,
    "allowSyntheticDefaultImports": true,
    "alwaysStrict": true,
    "baseUrl": "./",
    "lib": ["es2015", "es2016", "es2017", "es2019", "dom"],
    "module": "commonjs",
    "moduleResolution": "node",
    "noFallthroughCasesInSwitch": true,
    "noImplicitAny": true,
    "noImplicitReturns": true,
    "noImplicitThis": true,
    "noUnusedLocals": false,
    "noUnusedParameters": false,
    "sourceMap": true,
    "strictFunctionTypes": true,
    "strictNullChecks": true,
    "strictPropertyInitialization": true,
    "target": "es5",
    "strict": true,
    "emitDecoratorMetadata": true,
    "experimentalDecorators": true,
    "esModuleInterop": true
  },
  "compileOnSave": true
}