update go version

Author: beaquant

.travis.yml

@@ -1,6 +1,6 @@
 language: go
 go:
-  - 1.13
+  - 1.15
 
 sudo: false
 os:

go.mod

@@ -1,30 +1,28 @@
 module github.com/coinrust/crex
 
-go 1.13
+go 1.15
 
 require (
 	github.com/BurntSushi/toml v0.3.1
 	github.com/MauriceGit/skiplist v0.0.0-20191117202105-643e379adb62
-	github.com/adshao/go-binance v0.0.0-20200326152909-7314295d8a33
-	github.com/beaquant/utils v0.0.0-20200214111051-cad84a41cb41
+	github.com/beaquant/utils v0.0.0-20210215234655-6b25ba8e2337
 	github.com/chuckpreslar/emission v0.0.0-20170206194824-a7ddd980baf9
 	github.com/frankrap/bitmex-api v1.0.1
 	github.com/frankrap/bybit-api v1.0.3
 	github.com/frankrap/deribit-api v1.0.3
 	github.com/frankrap/huobi-api v1.0.2
 	github.com/frankrap/okex-api v1.0.4
-	github.com/go-echarts/go-echarts v0.0.0-20190915064101-cbb3b43ade5d
-	github.com/gobuffalo/packr v1.30.1 // indirect
+	github.com/go-echarts/go-echarts v1.0.0
 	github.com/json-iterator/go v1.1.10
 	github.com/micro/go-micro v1.18.0 // indirect
 	github.com/rakyll/statik v0.1.7
-	github.com/rocketlaunchr/dataframe-go v0.0.0-20200525081431-b8b481c96d94
-	github.com/sirupsen/logrus v1.7.0
+	github.com/rocketlaunchr/dataframe-go v0.0.0-20210217092801-7a54a6d5685b
+	github.com/sirupsen/logrus v1.8.1
 	github.com/sony/sonyflake v1.0.0
 	github.com/spf13/cast v1.3.1
-	github.com/stretchr/testify v1.6.1
-	github.com/tidwall/gjson v1.6.1
-	go.mongodb.org/mongo-driver v1.4.2
+	github.com/stretchr/testify v1.7.0
+	github.com/tidwall/gjson v1.7.4
+	go.mongodb.org/mongo-driver v1.5.1
 	go.uber.org/zap v1.16.0
 	gopkg.in/natefinch/lumberjack.v2 v2.0.0
 )