Add curly: 'error' to eslintrc and fix linting

libtextsecure/test/fake_web_api.js

@@ -45,8 +45,9 @@ const fakeAPI = {
         msg.timestamp === undefined ||
         msg.relay !== undefined ||
         msg.destination !== undefined
-      )
+      ) {
         throw new Error('Invalid message');
+      }
 
       messagesSentMap[
         `${destination}.${messageArray[i].destinationDeviceId}`