fix: align topicid protobuf variable names

topicCID -> topicID

Author: wemeetagain

src/message/rpc.proto.js

@@ -6,7 +6,7 @@ message RPC {
 
   message SubOpts {
     optional bool subscribe = 1; // subscribe or unsubcribe
-    optional string topicCID = 2;
+    optional string topicID = 2;
   }
 
   message Message {

src/peer.js

@@ -105,7 +105,7 @@ class Peer extends EventEmitter {
     topics.forEach((topic) => {
       subs.push({
         subscribe: subscribe,
-        topicCID: topic
+        topicID: topic
       })
     })
 
@@ -153,9 +153,9 @@ class Peer extends EventEmitter {
   updateSubscriptions (changes) {
     changes.forEach((subopt) => {
       if (subopt.subscribe) {
-        this.topics.add(subopt.topicCID)
+        this.topics.add(subopt.topicID)
       } else {
-        this.topics.delete(subopt.topicCID)
+        this.topics.delete(subopt.topicID)
       }
     })
   }