2.1.9

What's Changed

• Add PBXBuildRule and support for certain single character strings by @dnicolson in #108
• Make file references optional by @dnicolson in #111
• Allow wrapLines in file references by @dnicolson in #112
• Add PBXShellBuildPhase by @dnicolson in #113
• Allow dollar signs in scripts by @dnicolson in #114

Full Changelog: 2.1.8...2.1.9