add vendor

vendor/github.com/mitchellh/cli/Makefile

@@ -0,0 +1,17 @@
+TEST?=./...
+
+default: test
+
+# test runs the test suite and vets the code
+test:
+	go list $(TEST) | xargs -n1 go test -timeout=60s -parallel=10 $(TESTARGS)
+
+# testrace runs the race checker
+testrace:
+	go list $(TEST) | xargs -n1 go test -race $(TESTARGS)
+
+# updatedeps installs all the dependencies to run and build
+updatedeps:
+	go mod download
+
+.PHONY: test testrace updatedeps