Add a cached http client

go.mod

@@ -6,6 +6,7 @@ require (
 	code.cloudfoundry.org/go-diodes v0.0.0-20190809170250-f77fb823c7ee
 	github.com/ClickHouse/clickhouse-go v1.4.3 // indirect
 	github.com/Masterminds/squirrel v1.5.0
+	github.com/ReneKroon/ttlcache/v2 v2.3.0
 	github.com/astaxie/beego v1.12.3
 	github.com/bradleyjkemp/cupaloy v2.3.0+incompatible
 	github.com/cespare/reflex v0.3.0
@@ -47,7 +48,7 @@ require (
 	github.com/ziutek/mymysql v1.5.4 // indirect
 	golang.org/x/image v0.0.0-20191009234506-e7c1f5e7dbb8
 	golang.org/x/net v0.0.0-20201202161906-c7110b5ffcbb
-	golang.org/x/tools v0.0.0-20210105210202-9ed45478a130
+	golang.org/x/tools v0.0.0-20210112230658-8b4aab62c064
 	google.golang.org/protobuf v1.25.0 // indirect
 	gopkg.in/djherbis/atime.v1 v1.0.0
 	gopkg.in/djherbis/stream.v1 v1.3.1