4 packages from c-cube/qcheck at 0.10

[c-cube]

This pull-request concerns:
-qcheck.0.10: Compatibility package for qcheck
-qcheck-alcotest.0.10: Alcotest backend for qcheck
-qcheck-core.0.10: Core qcheck library
-qcheck-ounit.0.10: OUnit backend for qcheck

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• Homepage: https://github.com/c-cube/qcheck/
• Source repo: git+https://github.com/c-cube/qcheck.git
• Bug tracker: https://github.com/c-cube/qcheck/issues

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🐫 Pull-request generated by opam-publish v2.0.0

[camelus]

☀️ All lint checks passed 7c530df

• These packages passed lint tests: qcheck-alcotest.0.10, qcheck-core.0.10, qcheck-ounit.0.10, qcheck.0.10

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☀️ Installability check (+4)

• new installable packages (4): qcheck.0.10 qcheck-alcotest.0.10 qcheck-core.0.10 qcheck-ounit.0.10

[kit-ty-kate]

There are also several revdep failure that can be fixed:
oasis2opam > 0.6:

# ocamlfind: Package `qcheck.ounit' not found

stringext 1.4.{0,1,2}:

# ocamlfind: Package `qcheck.ounit' not found

syslog-message 0.0.*:

- File "test/test_syslog_message.ml", line 4, characters 15-35:
- 4 | let priority = QCheck.Arbitrary.int 184
-                    ^^^^^^^^^^^^^^^^^^^^
- Error: Unbound module QCheck.Arbitrary

[mseri]

I'll deal with the revdeps in a separate PR

[c-cube]

Thanks @kit-ty-kate and @mseri ! Sorry for creating more work for y'all.