Fix make dependencies recipe

Now it works with go modules.

Signed-off-by: Antonio Navarro Perez <[email protected]>

Author: ajnavarro

Makefile

@@ -42,3 +42,5 @@ ci-e2e: packages
 	-must-run \
 	-gitbase-bin="$(TRAVIS_BUILD_DIR)/build/gitbase_linux_amd64/gitbase" \
 	-gitbase-repos="$(TRAVIS_BUILD_DIR)/.." -v
+dependencies:
+	GO111MODULE=on go get -v ./...