Changed xcode version used in CI; changed swift version .swift-version file; changed swift version in podspec; changed swift badge in readme; consistently use double-quotes for strings in podspec; upgrade project to Xcode 9.3 and new project format; use Xcode's "new build system".
Organization name set to "Timofey Solomko"; reset some settings to its default values; remove separate test project and workspace by merging them into main project; move plist files inside xcode project; use project-wide settings as much as possible; set project version 50 (total amount of releases on github) and CFBundleShortVersion to 4.0.1; versions in xcode project are now managed by agvtool: project version is increased by 1 whenever there is a new release, CFBundleShortVersion will continue to be semantically versioned; remove some unused settings; remove header file and empty build phases.
Use recommended settings for TestSWCompression; move SWCompression above TestSWCompression in workspace; remove internal workspace from SWCompression; remove platform-specific schemes and targets from SWCompression; enable support for all Darwin platforms in one target/scheme; set deployment targets as minimal as possible; set correct rpath for TestSWCompression; remove unwanted files from TestSWCompression; reorder files in TestSWCompression; add correct test action to SWCompression scheme; remove code-signing.
Timofey Solomko