Enforce single quotes

src/polyfill.ts

@@ -22,27 +22,27 @@ export type PolyfillOptions = {
 function getRouter(fileToWatch: string, opts?: Partial<PolyfillOptions>): RequestHandler {
 	const features = new WaitForSync<PolyfillFeatureList>();
 	(async () => {
-		const worker = await spawn<WorkerFunction>(new Worker("./polyfill-worker"));
+		const worker = await spawn<WorkerFunction>(new Worker('./polyfill-worker'));
 		const feats = await worker(fileToWatch) as PolyfillFeatureList;
 		await Thread.terminate(worker);
 		return feats;
 	})()
 		.then(feats => {
-			feats["fetch"] = {};
-			Logger.debug("Polyfill analysed:", Object.keys(feats));
+			feats['fetch'] = {};
+			Logger.debug('Polyfill analysed:', Object.keys(feats));
 			features.setData(feats);
 		})
 		.catch(err => features.setError(err));
 
 	const options: Partial<PolyfillOptions> = {
 		minify: DefaultConfig.isProduction,
-		unknown: "polyfill",
+		unknown: 'polyfill',
 		...opts,
 	};
 	return async (req, res) => {
 		const polyfillBundle = await polyfillLibrary.getPolyfillString({
 			...options,
-			uaString: req.header("user-agent"),
+			uaString: req.header('user-agent'),
 			features: await features.resolve(),
 			stream: false,
 		});