Pytket-stim

New Contributors
* sjdilkes made their first contribution in https://github.com/CQCL/pytket-stim/pull/53

**Full Changelog**: https://github.com/CQCL/pytket-stim/compare/v0.20.0...v0.21.0

New Contributors
* yao-cqc made their first contribution in https://github.com/CQCL/pytket-stim/pull/39

**Full Changelog**: https://github.com/CQCL/pytket-stim/compare/v0.19.0...v0.20.0

What's Changed
* Main by cqc-melf in https://github.com/CQCL/pytket-stim/pull/34
* Update/dependabot docs by cqc-melf in https://github.com/CQCL/pytket-stim/pull/35
* update links in documentation by cqc-melf in https://github.com/CQCL/pytket-stim/pull/36

What's Changed
* Main by cqc-alec in https://github.com/CQCL/pytket-stim/pull/32