Added golangci-lint tool installation in the drone pipeline

Author: Mattia Bertorello

.drone.yml

@@ -6,10 +6,11 @@ pipeline:
   build:
     image: golang:1.10
     environment:
-    - DEP_RELEASE_TAG=v0.5.0
+      - DEP_RELEASE_TAG=v0.5.0
     commands:
       - go generate
-      # Tools install dep
+      # Tools install dep, golangci-lint
+      - curl -sfL https://install.goreleaser.com/github.com/golangci/golangci-lint.sh | bash -s -- -b $GOPATH/bin v1.10
       - curl https://raw.githubusercontent.com/golang/dep/master/install.sh | sh
       # Check the dependency, the -skip-lock is useful because the version are not fixed but depends from the branch master of the libraries so they change very often
       - dep check