fix go version

go.mod

@@ -1,29 +1,25 @@
 module github.com/dreamans/syncd
 
+go 1.16
+
 require (
 	cloud.google.com/go v0.36.0 // indirect
 	github.com/Unknwon/goconfig v0.0.0-20181105214110-56bd8ab18619
 	github.com/denisenkom/go-mssqldb v0.0.0-20190204142019-df6d76eb9289 // indirect
 	github.com/erikstmartin/go-testdb v0.0.0-20160219214506-8d10e4a1bae5 // indirect
-	github.com/gin-contrib/sse v0.0.0-20190226023149-996076df5b33 // indirect
 	github.com/gin-gonic/gin v1.4.0
 	github.com/go-sql-driver/mysql v1.4.1
 	github.com/gofrs/uuid v3.2.0+incompatible // indirect
-	github.com/golang/protobuf v1.3.0 // indirect
 	github.com/jinzhu/gorm v1.9.2
 	github.com/jinzhu/inflection v0.0.0-20180308033659-04140366298a // indirect
 	github.com/jinzhu/now v1.0.0 // indirect
-	github.com/json-iterator/go v1.1.5 // indirect
 	github.com/lib/pq v1.0.0 // indirect
-	github.com/mattn/go-isatty v0.0.6 // indirect
 	github.com/mattn/go-sqlite3 v1.10.0 // indirect
 	github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd // indirect
 	github.com/modern-go/reflect2 v1.0.1 // indirect
 	github.com/smartystreets/goconvey v0.0.0-20190222223459-a17d461953aa // indirect
 	github.com/stretchr/testify v1.3.0 // indirect
 	github.com/ugorji/go/codec v0.0.0-20190204201341-e444a5086c43 // indirect
-	golang.org/x/crypto v0.0.0-20190227175134-215aa809caaf // indirect
-	golang.org/x/net v0.0.0-20190227160552-c95aed5357e7 // indirect
 	google.golang.org/appengine v1.4.0 // indirect
 	gopkg.in/alexcesaro/quotedprintable.v3 v3.0.0-20150716171945-2caba252f4dc // indirect
 	gopkg.in/go-playground/assert.v1 v1.2.1 // indirect