v0.12.0

What's Changed

• contributing: add initial contributor guidelines by @jnikula in #90
• Cleanup formatting by @BrunoMSantos in #91
• Troubleshooting by @jnikula in #95
• Param names by @jnikula in #94
• Diagnostics v3 by @jnikula in #99
• doc: fix the language configuration by @jnikula in #100
• Test readme by @jnikula in #103
• Examples update v2 by @jnikula in #102
• test: add a separate test for clang diagnostics by @jnikula in #104

Full Changelog: v0.11.0...v0.12.0