* +docc prepare for docc publishing
* fix test discovery on 5.5 and 5.6
* Delete Package@swift-5.6.swift
* Update Package.swift
* Apply suggestions from code review
Co-authored-by: Yim Lee <yim_lee@apple.com>
Co-authored-by: Yim Lee <yim_lee@apple.com>
motivation: adjust to swift 5.6
changes:
* define sendable shims for protocols and structs that may be used in async context
* refactor Gauge to include rather than inherit Recorder
* adjust tests
* add a test to make sure no warning are emitted