26.1

This is a bugfix release for 26.

It contains a couple of fixes and no breaking changes.

List of PRs

• #4452 Backport 26.1: Remove dependency annotations from shaded classes
• #4443 Backport to 26.1: Fix nullable bound on DataFetcherResult.newResult
• #4444 Backport to 26.1: Fix covariance checks for SDL type extensions
• #4448 Backport 26.1: Fix input cycle validation for non-null lists
• #4447 Backport 26.1: Allow empty unions to be completed by extensions
• #4449 Backport 26.1: Fix subscription alternative call context cleanup
• #4446 Backport 26.1: Fix schema rebuild after root type deletion
• #4457 Backport 26.1: Mark InstrumentationState callback params as @nullable
• #4451 Backport 26.1: Reject cyclical SDL directive definitions
• #4450 Backport 26.1: validate circular default values

Full Changelog: v26.0...v26.1