tsconfig.json

{
	"compilerOptions": {
                "composite": true, /* Required because referenced by src/tsconfig.json */
		/* Basic Options */
		"target": "es2018" /* Specify ECMAScript target version: 'ES3' (default), 'ES5', 'ES2015', 'ES2016', 'ES2017','ES2018' or 'ESNEXT'. */,
		"module": "commonjs" /* Specify module code generation: 'none', 'commonjs', 'amd', 'system', 'umd', 'es2015', or 'ESNext'. */,
		"types": ["node", "jest"],
		"lib": ["es2018"],
		"declaration": true /* Generates corresponding '.d.ts' file. */,
		"sourceMap": true /* Generates corresponding '.map' file. */,
		"outDir": "." /* Redirect output structure to the directory. */,
		"rootDir": "." /* Specify the root directory of input files. Use to control the output directory structure with --outDir. */,
		/* Strict Type-Checking Options */
		"forceConsistentCasingInFileNames": true,
		"strict": true /* Enable all strict type-checking options. */,
		"noImplicitAny": false /* Raise error on expressions and declarations with an implied 'any' type. */,
		"noImplicitReturns": true,
		"noUnusedLocals": true,
		"noUnusedParameters": true,
		"strictNullChecks": true,
		"esModuleInterop": true,
		"experimentalDecorators": true,
		"resolveJsonModule": true,
		"plugins": [
			{
				"name": "typescript-tslint-plugin"
			}
		]
	},
	"files": ["package.json"]
}