Preserve sourcemaps (fixes #88)

Author: developit

src/rpc-worker-loader.js

@@ -11,10 +11,10 @@ function workerSetup() {
 				p = Promise.reject('No such method');
 			}
 			p.then(result => {
-					postMessage({ type: 'RPC', id, result });
-				})
+				postMessage({ type: 'RPC', id, result });
+			})
 				.catch(e => {
-					let error = { message: e};
+					let error = { message: e };
 					if (e.stack) {
 						error.message = e.message;
 						error.stack = e.stack;
@@ -29,6 +29,7 @@ function workerSetup() {
 
 const workerScript = '\n' + Function.prototype.toString.call(workerSetup).replace(/(^.*\{|\}.*$|\n\s*)/g, '');
 
-export default function rpcWorkerLoader(content) {
-	return content + workerScript;
+export default function rpcWorkerLoader(content, sourceMap) {
+	const callback = this.async();
+	callback(null, content + workerScript, sourceMap);
 }