Fix: Create annotation in API using thread rather than threadNumber (#…

…315)

- The annotations API refers to thread numbers as thread, therefore any
  create API request MUST provide the threadNumber as thread as to avoid
  adding the new annotation to it's own thread and incrementing the
  threadNumber

src/lib/annotations/AnnotationService.js

@@ -86,8 +86,12 @@ class AnnotationService extends EventEmitter {
                         threadID: annotation.threadID
                     },
                     message: annotation.text,
-                    threadNumber: annotation.threadNumber
+                    thread: annotation.threadNumber
                 })
+                // NOTE: Ensure that threadNumbers are sent to the API as
+                // thread, else the API created annotation will have an
+                // incremented threadNumber. This is due to the naming system
+                // in the annotations API
             })
                 .then((response) => response.json())
                 .then((data) => {