v0.12.0

What's Changed

• Main by @cqc-melf in #140
• Bump pyqir from 0.10.0 to 0.10.2 in the python-packages group across 1 directory by @dependabot in #143
• Add new issues to project, not Jira by @cqc-alec in #141
• Feature/mainonly by @cqc-alec in #144
• Bump actions/add-to-project from 1.0.1 to 1.0.2 by @dependabot in #148
• Bump pyqir from 0.10.2 to 0.10.3 in the python-packages group by @dependabot in #149
• speedup and cleanup by @cqc-melf in #147
• release 0.12.0rc0 by @cqc-melf in #150
• update pytket by @cqc-melf in #151
• fix mypy by @cqc-melf in #153
• update formater and linting by @cqc-melf in #154
• release 0.12.0 by @cqc-melf in #156

Full Changelog: v0.11.0...v0.12.0