try to fix travis by pinning a goreleaser release

.travis.yml

@@ -3,6 +3,7 @@ language: go
 install: make deps
 
 script:
-- go get github.com/goreleaser/goreleaser
+- wget https://github.com/goreleaser/goreleaser/releases/download/v0.62.2/goreleaser_Linux_x86_64.tar.gz
+- tar -xzf goreleaser_Linux_x86_64.tar.gz -C $GOPATH/bin
 - make
 - make test