release/1.10.0

• Updates dependency on zookeeper gem to 1.5.0 #90 (h/t: @malmckay)
• Move build to Github Actions, drop support for older Rubies (#104) (h/t: @malmckay)
• bump yard revision to ~> 0.9.11 (Fixes #101) (#102) (h/t: @slyphon)
• Add other Ruby versions with currently breaking tests (h/t: @berlincount)
• RSpec 3 support and cleanups (h/t: @nerdrew)
• Interrupt blocked locker (h/t: @lmarburger)

release/1.9.0

• Semaphores!
• shared/exclusive lock fixes