tsconfig.json

{
  "compilerOptions": {
    /* Language and Environment */
    "target": "es2016",                                   /* Set the JavaScript language version for emitted JavaScript and include compatible library declarations. */

    /* Modules */
    "module": "commonjs",                                 /* Specify what module code is generated. */

    /* Emit */
    "declaration": true,                                  /* Generate .d.ts files from TypeScript and JavaScript files in your project. */
    "outDir": "./dist",                                   /* Specify an output folder for all emitted files. */

    /* Interop Constraints */
    "esModuleInterop": true,                              /* Emit additional JavaScript to ease support for importing CommonJS modules. This enables 'allowSyntheticDefaultImports' for type compatibility. */
    "forceConsistentCasingInFileNames": true,             /* Ensure that casing is correct in imports. */

    /* Type Checking */
    "strict": true,                                       /* Enable all strict type-checking options. */
    "noImplicitAny": true,                                /* Enable error reporting for expressions and declarations with an implied 'any' type. */
    "noImplicitThis": true,                               /* Enable error reporting when 'this' is given the type 'any'. */
    "alwaysStrict": true,                                 /* Ensure 'use strict' is always emitted. */
    "noImplicitReturns": true,                            /* Enable error reporting for codepaths that do not explicitly return in a function. */
    "noFallthroughCasesInSwitch": true,                   /* Enable error reporting for fallthrough cases in switch statements. */

    /* Completeness */
    "skipLibCheck": true                                  /* Skip type checking all .d.ts files. */
  },
  "include": [
    "lib/**/*",
    "test/**/*"
  ]
}