update build

core/unifi/.travis.yml

@@ -1,15 +1,11 @@
 language: go
 go:
-- 1.12.x
+- 1.13.x
 before_install:
-- mkdir -p $GOPATH/bin
-  # Download the `dep` binary to bin folder in $GOPATH
-- curl -sLo $GOPATH/bin/dep https://github.com/golang/dep/releases/download/v0.5.3/dep-linux-amd64
-- chmod +x $GOPATH/bin/dep
   # download super-linter: golangci-lint
 - curl -sL https://install.goreleaser.com/github.com/golangci/golangci-lint.sh | sh -s -- -b $(go env GOPATH)/bin latest
 install:
-- dep ensure
+  - go mod vendor
 script:
 - golangci-lint run --enable-all -e G402 -D gochecknoglobals
 - go test ./...