tsconfig.json

{
    "$schema": "https://json.schemastore.org/tsconfig",
    "display": "Recommended",
    "compilerOptions": {
        "target": "es2020",
        "moduleResolution": "node",
        "strict": true,
        "alwaysStrict": true,
        "esModuleInterop": true,
        "skipLibCheck": false,
        "forceConsistentCasingInFileNames": true,
        "isolatedModules": true,
        "verbatimModuleSyntax": true,

        "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. */
        "rootDir": "./src",                       /* Specify the root directory of input files. Use to control the output directory structure with --outDir. */

        "noUnusedLocals": true,                   /* Report errors on unused locals. */
        "noImplicitReturns": true,                /* Report error when not all code paths in function return a value. */

        "experimentalDecorators": true,           /* Enables experimental support for ES7 decorators. */
        "emitDecoratorMetadata": true,            /* Enables experimental support for emitting type metadata for decorators. */
        "paths": {
            "@safelytyped/core-types": [ "./src/index" ]
        },
        "baseUrl": "."
    },
    "include": [
        "src"
    ],
    "exclude": [
        // "**/*.spec.ts",
        // "src/spec/**"
    ],
    "ts-node": {
        "esm": true,
        "require": ["tsconfig-paths/register"],
        "transpileOnly": true,
    }
}