tsconfig.json

{
	"compilerOptions": {
		"target": "ES6",
		"module": "esnext",
		"jsx": "react-jsx",
		// Search under node_modules for non-relative imports.
		"moduleResolution": "node",
		"sourceMap": true,

		// Enable the strictest settings like strictNullChecks & noImplicitAny.
		"strict": true,

		"allowSyntheticDefaultImports": true,
		"skipLibCheck": true,
		"strictNullChecks": true,
		"resolveJsonModule": true,
		"forceConsistentCasingInFileNames": true,
		// Import non-ES modules as default imports.
		"esModuleInterop": true,

		// Tells TypeScript to read JS files, as
		// normally they are ignored as source files
		"allowJs": true,

		// Types should go into this directory.
		// Removing this would place the .d.ts files
		// next to the .js files
		"outDir": "build",
		"typeRoots": [
			"node_modules/@types",
			"types"
		],
		"types": [
			"puppeteer",
			"jest-environment-puppeteer",
			"expect-puppeteer"
		]
	},
	"include": ["src/**/*"],
	"exclude": ["build","coverage"]
}