Address eslint errors.

src/inject/messaging/forwardTimingEvent.js

@@ -8,4 +8,4 @@ function forwardTimingEvent (timingEvent) {
   sendEventViaDocument(eventToContentScript);
 }
 
-export default forwardTimingEvent;
+export default forwardTimingEvent;

src/inject/messaging/sendSimpleMessage.js

@@ -1,8 +1,8 @@
 import sendEventViaDocument from './sendEventViaDocument.js';
 
-function sendSimpleMessage(action) {
-    const event = new CustomEvent(action);
-    sendEventViaDocument(event);
+function sendSimpleMessage (action) {
+  const event = new CustomEvent(action);
+  sendEventViaDocument(event);
 }
 
 export default sendSimpleMessage;

src/inject/pollConditionAsync.js

@@ -10,7 +10,7 @@ function pollConditionAsync (isConditionMet, intervalMs, maxRetries) {
         resolve(true);
       } else {
         remaining--;
-        
+
         if (remaining === 0) {
           clearInterval(interval);
           resolve(false);