Changed travis config

Signed-off-by: Vishal Rana <vr@labstack.com>

.travis.yml

@@ -6,6 +6,6 @@ before_install:
     - go get github.com/mattn/goveralls
     - go get golang.org/x/tools/cmd/cover
 script:
-    - go test ./...
+    - go test ./color -coverprofile=color.coverprofile
     - $HOME/gopath/bin/gover
     - $HOME/gopath/bin/goveralls -coverprofile=gover.coverprofile -service=travis-ci