v6.4.0 for KSP 1.12.x

What's Changed

• Add Petal Option to Fairing Sides by @ryanc55 in #47
• Fix payload fairing thickness calculation by @FioraAeterna in #46
• Build system maintenance by @StonesmileGit in #49

New Contributors

• @ryanc55 made their first contribution in #47
• @StonesmileGit made their first contribution in #49
• @FioraAeterna made their first contribution in #46

Full Changelog: v6.3.0...v6.4.0.0