moved abci change to features as it doesnt break the abci

CHANGELOG.md

@@ -19,11 +19,6 @@ program](https://hackerone.com/tendermint).
 
 - Go API
 
-  - [abci] [\#2127](https://github.com/tendermint/tendermint/issues/2127) ABCI / mempool: Add a "Recheck Tx" indicator. Breaks the ABCI
-    client interface (`abcicli.Client`) to allow for supplying the ABCI
-    `types.RequestCheckTx` and `types.RequestDeliverTx` structs, and lets the
-    mempool indicate to the ABCI app whether a CheckTx request is a recheck or
-    not. see [docs](https://github.com/tendermint/tendermint/blob/eddb433d7c082efbeaf8974413a36641519ee895/docs/spec/abci/apps.md#mempool-connection)
   - [libs] Remove unused `db/debugDB` and `common/colors.go` & `errors/errors.go` files (@marbar3778)
   - [libs] [\#2432](https://github.com/tendermint/tendermint/issues/2432) Remove unused `common/heap.go` file (@marbar3778)
   - [libs] Remove unused `date.go`, `io.go`. Remove `GoPath()`, `Prompt()` and `IsDirEmpty()` functions from `os.go` (@marbar3778)
@@ -33,6 +28,11 @@ program](https://hackerone.com/tendermint).
 - [node] Add variadic argument to `NewNode` to support functional options, allowing the Node to be more easily customized. 
 - [node][\#3730](https://github.com/tendermint/tendermint/pull/3730) Add `CustomReactors` option to `NewNode` allowing caller to pass
   custom reactors to run inside Tendermint node (@ParthDesai)
+- [abci] [\#2127](https://github.com/tendermint/tendermint/issues/2127) ABCI / mempool: Add a "Recheck Tx" indicator. Breaks the ABCI
+  client interface (`abcicli.Client`) to allow for supplying the ABCI
+  `types.RequestCheckTx` and `types.RequestDeliverTx` structs, and lets the
+  mempool indicate to the ABCI app whether a CheckTx request is a recheck or
+  not. see [docs](https://github.com/tendermint/tendermint/blob/eddb433d7c082efbeaf8974413a36641519ee895/docs/spec/abci/apps.md#mempool-connection)
 
 ### IMPROVEMENTS: