Use dep for TravisCI builds

.travis.yml

@@ -22,9 +22,14 @@ cache:
     - $GOPATH/src
     - $GOPATH/pkg
 
+before_install:
+  # Download the binary to bin folder in $GOPATH
+  - curl -L -s https://github.com/golang/dep/releases/download/v0.4.1/dep-linux-amd64 -o $GOPATH/bin/dep
+  # Make the binary executable
+  - chmod +x $GOPATH/bin/dep
+
 install:
-  - make deps
-  - (cd $GOPATH/src/github.com/docker/docker && git fetch --all --tags --prune && git checkout v17.05.0-ce)
+  - dep ensure
   - sudo apt-get update && sudo apt-get --allow-downgrades install docker-ce=17.05.0*
   - go get github.com/mattn/goveralls