fix: produce correct wheel metadata

all published deltachat-rpc-server wheels so far fail "wheel tags"
and probably other tools.
Translate "dev" cargo-versioning to PEP440-versioning
to make CI dev wheel builds reproducable at least for the 11 non-mac targets.

.github/workflows/deltachat-rpc-server.yml

@@ -370,6 +370,14 @@ jobs:
       - name: List artifacts
         run: ls -l dist/
 
+      - name: Check that the wheel metadata reads back
+        run: |
+          echo 'You can check a local `nix build` on non-Mac machines against the following checksums.'
+          sha256sum dist/*.whl
+          mkdir tagcheck
+          cp dist/*.whl tagcheck/
+          nix run --inputs-from . nixpkgs#python3Packages.wheel -- tags tagcheck/*.whl
+
       - name: Upload binaries to the GitHub release
         if: github.event_name == 'release'
         env: