tsconfig.json

{
  "compilerOptions": {
    "incremental": true /* Enable incremental compilation */,
    "target": "ES5" /* Specify ECMAScript target version: 'ES3' (default), 'ES5', 'ES2015', 'ES2016', 'ES2017', 'ES2018', 'ES2019' or 'ESNEXT'. */,
    "module": "commonjs" /* Specify module code generation: 'none', 'commonjs', 'amd', 'system', 'umd', 'es2015', or 'ESNext'. */,
    "lib": [
      "es2015",
      "es2017",
      "esnext",
      "dom"
    ] /* Specify library files to be included in the compilation. */,
    "jsx": "react" /* Specify JSX code generation: 'preserve', 'react-native', or 'react'. */,
    "declaration": true /* Generates corresponding '.d.ts' file. */,
    "declarationMap": true /* Generates a sourcemap for each corresponding '.d.ts' file. */,
    "sourceMap": true /* Generates corresponding '.map' file. */,
    "outDir": "./lib" /* Redirect output structure to the directory. */,
    "removeComments": true /* Do not emit comments to output. */,
    "strict": true /* Enable all strict type-checking options. */,
    "noImplicitAny": true /* Raise error on expressions and declarations with an implied 'any' type. */,
    "noImplicitThis": true /* Raise error on 'this' expressions with an implied 'any' type. */,

    "noUnusedLocals": true /* Report errors on unused locals. */,
    "noUnusedParameters": true /* Report errors on unused parameters. */,
    "noImplicitReturns": true /* Report error when not all code paths in function return a value. */,
    "moduleResolution": "node" /* Specify module resolution strategy: 'node' (Node.js) or 'classic' (TypeScript pre-1.6). */,
    "esModuleInterop": true /* Enables emit interoperability between CommonJS and ES Modules via creation of namespace objects for all imports. Implies 'allowSyntheticDefaultImports'. */
  },
  "exclude": ["src/*.test.ts", "lib"],
  "include": ["src"]
}