bump to release 1.1.6 #1373

Job	Run time
gateway (sqlite3, 100M)	2m 17s
gateway (sqlite3, 100M)	2m 14s
gateway (redis, 100M)	1m 30s
gateway (redis, 100M)	1m 24s
gateway (tikv, 100M)	2m 42s
gateway (tikv, 100M)	2m 32s
gateway (badger, 100M)	1m 9s
gateway (badger, 100M)	1m 8s
gateway (etcd, 100M)	1m 45s
gateway (etcd, 100M)	1m 49s
gateway (fdb, 100M)	1m 56s
gateway (fdb, 100M)	1m 54s
gateway (mariadb, 100M, read committed)	3m 1s
gateway (mariadb, 100M, read committed)	3m 4s
gateway (mysql, 100M, read committed)	2m 46s
gateway (mysql, 100M, read committed)	2m 47s
gateway (mysql, 100M, repeatable read)	2m 46s
gateway (mysql, 100M, repeatable read)	2m 39s
gateway (mysql, 100M, serializable)	2m 44s
gateway (mysql, 100M, serializable)	2m 41s
gateway (postgres, 100M, read committed)	2m 36s
gateway (postgres, 100M, read committed)	2m 32s
gateway (postgres, 100M, repeatable read)	2m 35s
gateway (postgres, 100M, repeatable read)	2m 28s
gateway (postgres, 100M, serializable)	2m 26s
gateway (postgres, 100M, serializable)	2m 27s
gateway (tidb, 100M, read committed)	7m 6s
gateway (tidb, 100M, read committed)	7m 28s
gateway (tidb, 100M, repeatable read)	7m 21s
gateway (tidb, 100M, repeatable read)	7m 23s
success-all-test	6s
success-all-test	5s
	1h 29m 21s

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