Bug Fixes (from CHANGELOG.md)

• Fix regression (introduced in v3.6.0) that caused BatchHttpLink to discard pending batched queries on early completion of the underlying Observable. @benjamn in #9793

What's Changed (auto-generated by GitHub)

• fixes pr 9600 by @jpvajda in https://github.com/apollographql/apollo-client/pull/9776
• Update mutations.mdx by @Gregoirevda in https://github.com/apollographql/apollo-client/pull/9708
• updates roadmap for june 2022 by @jpvajda in https://github.com/apollographql/apollo-client/pull/9784
• fixes expansion panel by @jpvajda in https://github.com/apollographql/apollo-client/pull/9777
• Backport PR #9793 from release-3.7 branch to main by @benjamn in https://github.com/apollographql/apollo-client/pull/9807

Full Changelog: https://github.com/apollographql/apollo-client/compare/v3.6.6...v3.6.7