Merge pull request #61 from coq-community/ci-weekly · coq-community/fourcolor@1efde3a

The following actions uses Node.js version which is deprecated and will be forced to run on node20: actions/checkout@v3. For more info: https://github.blog/changelog/2024-03-07-github-actions-all-actions-will-run-on-node20-instead-of-node16-by-default/

z'G' is declared opaque (Qed) but this is not fully respected inside

z_barb_z is declared opaque (Qed) but this is not fully respected

clink_at_G' is declared opaque (Qed) but this is not fully respected

clink_at_G is declared opaque (Qed) but this is not fully respected

z_comp_preimage is declared opaque (Qed) but this is not fully

z_barb_comp is declared opaque (Qed) but this is not fully respected

not_cross_edge_Walkup is declared opaque (Qed) but this is not fully

disconnected_cross_edge is declared opaque (Qed) but this is not

not_cross_connected is declared opaque (Qed) but this is not fully

eCedom is declared opaque (Qed) but this is not fully respected

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