update changelog.md and tools dep to 2.1.5 (#477) (#478)

* update changelog.md and tools dep to 2.1.5

* Update CHANGELOG.md

Co-Authored-By: july2993 <[email protected]>

Author: july2993

CHANGELOG.md

@@ -14,3 +14,13 @@ All notable changes to this project are documented in this file.
 + Other
 	- Add integration test for node status [#416](https://github.com/pingcap/tidb-binlog/pull/416)
 
+## [2.1.4]
+- Nothing's changed
+
+## [2.1.5]
+- Update the DDL binlog replication plan to guarantee the correctness of DDL [#466](https://github.com/pingcap/tidb-binlog/pull/466)
+- Switch juju/errors to pingcap/error [#464](https://github.com/pingcap/tidb-binlog/pull/464)
+- Open go mod and update despondencies [#475](https://github.com/pingcap/tidb-binlog/pull/475)
+- Add package pkg/loader [#471](https://github.com/pingcap/tidb-binlog/pull/471)
+- Add tool Arbiter sync from Kafka to Mysql [#441](https://github.com/pingcap/tidb-binlog/pull/441)
+

go.mod

@@ -42,7 +42,7 @@ require (
 	github.com/pingcap/parser v0.0.0-20190118033454-a52e5bde3bd2
 	github.com/pingcap/pd v2.1.3+incompatible
 	github.com/pingcap/tidb v2.1.3+incompatible
-	github.com/pingcap/tidb-tools v2.1.3-0.20190131080057-1e1754144120+incompatible
+	github.com/pingcap/tidb-tools v2.1.5+incompatible
 	github.com/pingcap/tipb v0.0.0-20190107072121-abbec73437b7
 	github.com/prometheus/client_golang v0.8.0
 	github.com/rcrowley/go-metrics v0.0.0-20180503174638-e2704e165165