Don't only watch on the first file request

Author: jfmengels

lib/watch.js

@@ -85,7 +85,7 @@ function watchFiles(
           elmJsonWatcher.close(),
           readmeWatcher.close(),
           fileWatcher.close(),
-          extraFilesWatcher.close(),
+          extraFilesWatchers.forEach(watcher => watcher.close()),
           suppressedErrorsWatcher.close(),
           configurationWatcher && configurationWatcher.close()
         ]);
@@ -128,13 +128,13 @@ function watchFiles(
     sourceDirectories
   );
 
-  const extraFilesWatcher = createExtraFilesWatcher(
+  const extraFilesWatchers = requestedExtraFiles.map(request => createExtraFilesWatcher(
     options,
     app,
     runReview,
     onError,
-    requestedExtraFiles
-  );
+    request
+  ));
 
   const suppressedErrorsWatcher = createSuppressedFilesWatcher(
     options,
@@ -154,7 +154,7 @@ function watchFiles(
         elmJsonWatcher.close(),
         readmeWatcher.close(),
         fileWatcher.close(),
-        extraFilesWatcher.close(),
+        extraFilesWatchers.forEach((watcher) => watcher.close()),
         suppressedErrorsWatcher.close()
       ]);
 
@@ -376,17 +376,16 @@ function createFileWatcher(
  * @param {App} app
  * @param {() => void} runReview
  * @param {(err: Error) => void} onError
- * @param {ExtraFileRequest[]} extraFileRequests
+ * @param {ExtraFileRequest} request
  * @return {FSWatcher}
  */
 function createExtraFilesWatcher(
   options,
   app,
   runReview,
   onError,
-  extraFileRequests
+  request
 ) {
-  const request = extraFileRequests[0];
   return chokidar
     .watch(
       request.files.map(