v4.0.0-rc1

What's Changed

• allow a manual run of the release for debugging by @chrishagglund-ship-it in #130
• CCOR-13194 - Switch integration tests to run against sm v4 server and sdkdev for v5 by @chrishagglund-ship-it in #127
• CCOR-13193 - test against oss server in ci by @chrishagglund-ship-it in #129
• Merge Agentspan SDK and Implement following the Implementation Guide by @kowser-orkes in #131

New Contributors

• @kowser-orkes made their first contribution in #131

Full Changelog: v3.1.0...v4.0.0-rc1