v0.20.0

What's Changed

• Update pytket-cirq requirement from ~=0.37.0 to ~=0.38.0 in the python-packages group by @dependabot in #132
• update os version by @cqc-melf in #133
• Update pytket-cirq requirement from ~=0.38.0 to ~=0.39.0 in the python-packages group by @dependabot in #134
• URL by @cqc-alec in #135
• update copyright by @cqc-melf in #136
• Update dependencies; fix import error by @cqc-alec in #139
• remove docs build from release workflow by @cqc-melf in #138
• Melf/release 0 20 0 by @cqc-melf in #140

Full Changelog: v0.19.0...v0.20.0