tsconfig.json

{
    "compilerOptions": {
        "incremental": true,
        "target": "esNext",
        "outDir": "build",
        "rootDir": "src",
        "moduleResolution": "node",
        "module": "commonjs",
        "declaration": true,
        "inlineSourceMap": true,
        "esModuleInterop": true /* Enables emit interoperability between CommonJS and ES Modules via creation of namespace objects for all imports. Implies 'allowSyntheticDefaultImports'. */,
        "resolveJsonModule": true /* Include modules imported with .json extension. */,
        /* Additional Checks */
        "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. */,
        "noFallthroughCasesInSwitch": true /* Report errors for fallthrough cases in switch statement. */,
        /* Debugging Options */
        "traceResolution": false /* Report module resolution log messages. */,
        "listEmittedFiles": false /* Print names of generated files part of the compilation. */,
        "listFiles": false /* Print names of files part of the compilation. */,
        "pretty": true /* Stylize errors and messages using color and context. */,
        "lib": ["es2017", "DOM"],
        "types": ["node"],
        "typeRoots": ["node_modules/@types", "src/types"]
    },
    "include": ["src/**/*.ts"],
    "exclude": ["node_modules/**"],
    "compileOnSave": true
}