ProxSuite 0.2.14

What's Changed

• [pre-commit.ci] pre-commit autoupdate by @pre-commit-ci in #134
• update benchmarks random mixed qp by @fabinsch in #137
• [pre-commit.ci] pre-commit autoupdate by @pre-commit-ci in #138
• add is_valid function for dense model and fix example + unittest by @fabinsch in #139

Full Changelog: v0.2.13...v0.2.14