Use staticcheck in drone

.drone.yml

@@ -10,10 +10,11 @@ pipeline:
       event: [ push, pull_request ]
     image: golang
     commands:
+      - go install honnef.co/go/tools/cmd/staticcheck@latest
       - wget https://git.openprivacy.ca/openprivacy/buildfiles/raw/master/tor/tor -P tmp/
       - chmod a+x tmp/tor
       - go mod download
-      - go get -u golang.org/x/lint/golint
+      - go get -u
   quality:
     when:
       repo: openprivacy/connectivity
@@ -21,8 +22,7 @@ pipeline:
       event: [ push, pull_request ]
     image: golang
     commands:
-      - go list ./... | xargs go vet
-      - go list ./... | xargs golint -set_exit_status
+      - staticcheck ./...
   units-tests:
     when:
       repo: openprivacy/connectivity