ci: add pipeline with upstream libinjection integration

[Copilot]

• Create .github/workflows/ci.yml GitHub Actions pipeline
• Apply reviewer suggestions (single main branch, drop Python 3.8)
• Fix Node.js 20 deprecation warnings: upgrade actions/checkout@v4 → @v6 and actions/setup-python@v5 → @v6
• Remove deprecated SWIG -py3 flag from ci.yml
• Fix ImportError: undefined symbol: libinjection_sqli_not_whitelist:
  • Add %ignore directives in libinjection/libinjection.i for all four static upstream functions (sqli_reset, sqli_lookup_word, sqli_blacklist, sqli_not_whitelist) so SWIG does not generate broken wrappers
  • Update json2python.py to use sqli_check_fingerprint (non-static public API that internally applies both blacklist and whitelist logic) instead of calling the now-ignored sqli_not_whitelist
• All 4 tests pass locally (test_tokens, test_tokens_mysql, test_folding, test_fingerprints)

Original prompt

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This section details on the original issue you should resolve

<issue_title>Add pipeline tests</issue_title>
<issue_description>Create a new pipeline to test that the module works with upstream changes. It should use github actions for python and get the files from upstream.</issue_description>

Comments on the Issue (you are @copilot in this section)

• Fixes Add pipeline tests #8

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[fzipi]

@copilot Fix the warnings in the pipeline run: https://github.com/libinjection/python3-libinjection/actions/runs/23140793713/job/67216259478?pr=9

[Copilot]

@copilot Fix the warnings in the pipeline run: https://github.com/libinjection/python3-libinjection/actions/runs/23140793713/job/67216259478?pr=9

Fixed in commit 2b9c83d. Three changes were made:

1. Node.js 20 deprecation warnings — upgraded actions/checkout@v4 → @v6 and actions/setup-python@v5 → @v6 (both v6 support Node.js 24). Also removed the deprecated SWIG -py3 flag.

2. ImportError: undefined symbol: libinjection_sqli_not_whitelist — the upstream header declares sqli_not_whitelist, sqli_blacklist, sqli_lookup_word, and sqli_reset as static, giving them internal linkage. SWIG was generating wrappers that tried to call these symbols from libinjection_wrap.c, causing the undefined symbol at .so load time. Added %ignore directives in libinjection.i for all four static functions.

3. json2python.py — replaced the now-unavailable sqli_not_whitelist(state) call with sqli_check_fingerprint(state), which is the public non-static API that internally performs both the fingerprint membership check and the whitelist false-positive reduction. All 4 tests pass locally.