Enable vendor mode in CI, verbose lint

.drone.yml

@@ -6,8 +6,8 @@ steps:
 - name: test
   image: fat0troll/tdlib-golangci
   commands:
-  - go test -test.v -cover `go list ./... | grep -v examples | grep -v internal`
+  - go -mod=vendor test -test.v -cover `go list ./... | grep -v examples | grep -v internal`
 - name: lint
   image: fat0troll/tdlib-golangci
   commands:
-  - golangci-lint run
+  - golangci-lint -v run