v7.0.0-rc.9

This is release candidate 9, suitable for testing in pre-production environments

What's Changed

• Consistently use Task or ValueTask in APIs by @lukebakken in #1646
• Added ability to use Issuer to receive Token Endpoint for the OAuth2ClientBuilder by @Lyphion in #1656
• Finish up version 7 release by @lukebakken in #1661
• Fix NextPublishSeqNo when retrieved concurrently by @lukebakken in #1662
• Clean up IChannelExtensions by @lukebakken in #1664

New Contributors

• @Lyphion made their first contribution in #1656

Full Changelog: v7.0.0-rc.8...v7.0.0-rc.9