fix type in removeOutgoingMessage(mid) doc

Amin Ahmed Khan · web-flow · commit 40e12f754e99 · 2018-07-20T17:56:15.000+05:00
diff --git a/README.md b/README.md
@@ -372,7 +372,7 @@ Close the client, accepts the following options:
 ### mqtt.Client#removeOutgoingMessage(mid)
 
 Remove a message from the outgoingStore.
-The outgoing callback will be called withe Error('Message removed') if the message is removed.
+The outgoing callback will be called with Error('Message removed') if the message is removed.
 
 After this function is called, the messageId is released and becomes reusable.
 
