SwiftGen 6.1.0

[djbe]

Waiting on:

• [x] Core Data @objc annotations #575
• [x] Filter input files #570

Todo:

• [x] Release and update StencilSwiftKit 2.7.2
• [x] Update Kanna to 4.0.3
• [x] Update podspec
• [x] ⚠️ Update the brew formula (output paths are okay, only new coredata command)

[djbe]

Brewfile changes:

• Add fixture: "Tests/Fixtures/Resources/CoreData/Model.xcdatamodeld" => "Model.xcdatamodeld",
• Add fixture: "Tests/Fixtures/Generated/CoreData/swift4-context-defaults.swift" => "coredata.swift",
• Add test:

output = shell_output("#{bin}/swiftgen coredata --templatePath #{pkgshare/"templates/coredata/swift4.stencil"} #{fixtures}/Model.xcdatamodeld").strip
assert_equal output, (fixtures/"coredata.swift").read.strip, "swiftgen coredata failed"

The other fixture paths (for the other commands) are okay.

[AliSoftware]

Changes made in the brew formula, pending PR here