Thumbtack Star Versions Save

• Update Swift & Swift tools versions to 5.4
• Update Travis config to run on macOS 11.0 + Xcode 12.5

• Update Swift & Swift tools versions to 5.3
• Update Travis config to run on Xcode 12.1

Breaking:

• Replace --includeTypeInheritance argument with a more generic --include-syntax which allows customizing all forms of syntax included in usage counts

Other:

• Bug fixes to parsing of --files argument
• Bug fixes & cleanup to make install

• Add executable and static library products
• Migrate to the new Swift ArgumentParser library for the command-line tool

• New feature: Add --includeTypeInheritance argument to have STAR count subclassing and protocol conformance as "using" the superclass/protocol
• Add SwiftLint and SwiftFormat to CI checks
• Improve error descriptions in output

Breaking changes:

• Update dependencies for Xcode 11.4, which seem to break compatibility with Xcode ≤11.3.

When --verbose flag is supplied, include a list of files that reference the input types in the output.

Initial release of STAR 🎉