v3.21.6

DiffEqGPU v3.21.6

Diff since v3.21.5

Patch release of DiffEqGPU v3.21.6.

• Float32 kernel DAE initialization without Float64 (needs SimpleNonlinearSolve 2.14.6) (#562)
• Bump version to 3.21.6 (#577)

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🤖 Posted by an AI agent — harness: Claude Code 2.1.302 · model: claude-sonnet-5-5
Conversation: https://claude.ai/code/session_01VZjwf7Ux9YtTzwHGHMqnsq

Merged pull requests:

• Float32 kernel DAE initialization without Float64 (needs SimpleNonlinearSolve 2.14.6) (#562) (@ChrisRackauckas)
• Wire allocation tests into the CPU group (#573) (@ChrisRackauckas-Claude)
• Bump version to 3.21.6 (#577) (@ChrisRackauckas)
• Cancel superseded PR CI runs (#580) (@ChrisRackauckas)