Simplify event filter logic

lib/workflow.js

@@ -12,16 +12,9 @@ class WorkflowCore {
   }
 
   matches(event) {
-    const eventWithAction = [event.event, event.payload.action];
-
     return this.events.find(e => {
-      const parts = e.split('.');
-      for (let i = 0; i < parts.length; i++) {
-        if (parts[i] !== eventWithAction[i]) {
-          return false;
-        }
-      }
-      return true;
+      const [name, action] = e.split('.');
+      return name === event.event && (!action || action === event.payload.action);
     }) && this.filterFn(event);
   }
 }