fix(notifications): show an explicit unavailable state instead of a dead WebView - #18

Calling string comparison format for `depends_on macos:` is deprecated! Use `depends_on macos: :catalina` instead. Please report this issue to the wix/homebrew-brew tap (not Homebrew/* repositories), or even better, submit a PR to fix it: /opt/homebrew/Library/Taps/wix/homebrew-brew/Casks/detox-instruments.rb:9