ci: include compiled archives in snapshot build releases (#6)

Author: zimeg

.circleci/config.yml

@@ -151,8 +151,8 @@ jobs:
       - run:
           name: Run GoReleaser. Without actually publishing.
           command: |
-            export LDFLAGS="-s -w -X 'github.com/slackapi/slack-cli/internal/pkg/version.Version=$BUILD_VERSION'"
-            make build-snapshot
+            LDFLAGS="-s -w -X 'github.com/slackapi/slack-cli/internal/pkg/version.Version=$BUILD_VERSION'"
+            make LDFLAGS="$LDFLAGS" build-snapshot
       - run:
           name: Show binaries are generated correctly
           command: ls -R ./dist