chore: release v1.2.6 (#1333) #2135

Job	Run time
Test wasm (wasm32-unknown-unknown)	43s
Test build-std (aarch64-tvos)	2m 15s
Test build-std (aarch64-tvos-sim)	2m 23s
Test build-std (x86_64-tvos)	2m 9s
Clippy	11s
Test CUDA support	24s
MSRV (ubuntu-latest)	21s
MSRV (windows-latest)	42s
MSRV (macos-latest)	29s
Rustfmt	8s
semver-checks	11s
Test wasm32-wasip1-thread	35s
Test (stable)	1m 41s
Test (beta)	1m 53s
Test (nightly)	1m 55s
Test (linux32)	2m 31s
Test (macos)	3m 53s
Test (aarch64-macos)	1m 36s
Test (aarch64-ios)	1m 40s
Test (win32)	2m 50s
Test (win64)	2m 55s
Test (mingw32)	3m 31s
Test (mingw64)	3m 27s
Test (windows-2019)	3m 15s
Test (windows-aarch64, windows-latest, stable, aarch64-pc-windows-msvc, --no-run)	4m 4s
Test (windows-clang, windows-2019, stable, x86_64-pc-windows-msvc, clang, clang++)	3m 58s
Test (windows-clang-cl, windows-2019, stable, x86_64-pc-windows-msvc, clang-cl, clang-cl)	3m 52s
	53m 32s

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