chore(tket-qsystem): release v0.20.0 #1236

	name: Rust Semver Checks
	on:
	pull_request_target:
	branches:
	- main

	jobs:
	# Check if changes were made to the relevant files.
	# Always returns true if running on the default branch, to ensure all changes are thoroughly checked.
	changes:
	name: Check for changes
	runs-on: ubuntu-latest
	permissions:
	pull-requests: read
	outputs:
	rust: ${{ steps.filter.outputs.rust }}
	python: ${{ steps.filter.outputs.python }}
	steps:
	- uses: actions/checkout@v5
	- uses: ./.github/actions/check-changes
	id: filter

	rs-semver-checks:
	needs: [changes]
	if: ${{ needs.changes.outputs.rust == 'true' }}
	runs-on: ubuntu-latest
	env:
	TKET_C_API_PATH: ${{ github.workspace }}/tket-c-api
	LD_LIBRARY_PATH: ${{ github.workspace }}/tket-c-api/lib
	steps:
	- name: Checkout tket
	uses: actions/checkout@v5
	- name: Install tket-c-api library
	uses: ./.github/actions/tket-c-api
	with:
	install-path: ${{ env.TKET_C_API_PATH }}
	- name: Install LLVM from apt
	run: \|
	echo "Installing apt dependencies: llvm-14"
	sudo apt-get install -y llvm-14
	- uses: CQCL/hugrverse-actions/rs-semver-checks@main
	env:
	TKET_C_API_PATH: ${{ env.TKET_C_API_PATH }}
	with:
	token: ${{ secrets.HUGRBOT_PAT }}

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