Move CanonicalVoteExtension to canonical types proto defs

Signed-off-by: Thane Thomson <connect@thanethomson.com>

proto/tendermint/abci/types.proto

@@ -451,16 +451,6 @@ message ExtendedVoteInfo {
   bytes vote_extension = 3;
 }
 
-// CanonicalVoteExtension
-// TODO: move this to core Tendermint data structures
-message CanonicalVoteExtension {
-  bytes  extension = 1;
-  int64  height    = 2;
-  int32  round     = 3;
-  string chain_id  = 4;
-  bytes  address   = 5;
-}
-
 enum EvidenceType {
   UNKNOWN             = 0;
   DUPLICATE_VOTE      = 1;

proto/tendermint/types/canonical.proto

@@ -35,3 +35,12 @@ message CanonicalVote {
   google.protobuf.Timestamp timestamp = 5 [(gogoproto.nullable) = false, (gogoproto.stdtime) = true];
   string                    chain_id  = 6 [(gogoproto.customname) = "ChainID"];
 }
+
+// CanonicalVoteExtension
+message CanonicalVoteExtension {
+  bytes  extension = 1;
+  int64  height    = 2;
+  int32  round     = 3;
+  string chain_id  = 4;
+  bytes  address   = 5;
+}