change getty version to 1.2.0

go.mod

 module github.com/apache/dubbo-go
 
 require (
-	github.com/dubbogo/getty v1.1.2-0.20190709001822-cd6ab9c84ebc
+	github.com/dubbogo/getty v1.2.0
 	github.com/dubbogo/gost v1.1.1
 	github.com/dubbogo/hessian2 v1.2.0
 	github.com/magiconair/properties v1.8.1

go.sum

 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
-github.com/dubbogo/getty v1.1.2-0.20190709001822-cd6ab9c84ebc h1:HLvcjXfrrfeyoA2IpEymaE1npIMjtPvzzXdCvPbua9Y=
-github.com/dubbogo/getty v1.1.2-0.20190709001822-cd6ab9c84ebc/go.mod h1:p9Pyk18a+5Aa0GZ546aCzlehEfvEof0jAF0+QQcEPYQ=
+github.com/dubbogo/getty v1.2.0 h1:LmP/R/yCYp5/ubUTm5Xa7QwE3EnFFSjguJH8DJruJ70=
+github.com/dubbogo/getty v1.2.0/go.mod h1:p9Pyk18a+5Aa0GZ546aCzlehEfvEof0jAF0+QQcEPYQ=
 github.com/dubbogo/gost v1.0.1-0.20190706005735-65c3ecbba418/go.mod h1:R7wZm1DrmrKGr50mBZVcg6C9ekG8aL5hP+sgWcIDwQg=
 github.com/dubbogo/gost v1.1.1 h1:JCM7vx5edPIjDA5ovJTuzEEXuw2t7xLyrlgi2mi5jHI=
 github.com/dubbogo/gost v1.1.1/go.mod h1:R7wZm1DrmrKGr50mBZVcg6C9ekG8aL5hP+sgWcIDwQg=