Fix Homebrew install on macOS Catalina

[bkuhlmann]

Overview

Looks like the Homebrew cask is broken for macOS Catalina. This behavior does not exist in the previous version of macOS.

• [x] I have searched open and closed issues for duplicates

Steps to Reproduce

To reproduce, follow these steps:

• Install/upgrade to macOS Catalina.
• Run: brew cask install signal.
• Launch /Applications/Signal.app.
• Notice you get an error dialog.

Expected Result

I should be able to launch Signal without the dialog error.

Workaround

Manually downloaded Signal directly from the downloads page but would prefer to automate all of this via Homebrew.

Screenshots/Screencasts

The following dialog is shown on Catalina after installing via Homebrew:

Platform Info

• Signal Version: 1.27.4
• Operating System: macOS Catalina 10.15
• Linked Device Version: N/A

[kenpowers-signal]

Hi, @bkuhlmann. We only recently started notarizing our Beta builds. Notarization will hit the production builds soon (as required by Catalina).

[bkuhlmann]

:bow: @kenpowers-signal. Excellent, looking forward to the new build.

[kenpowers-signal]

@bkuhlmann My apologies, we actually are notarizing our production builds right now. I've submitted a PR to the homebrew cask repo to update the signal formula: https://github.com/Homebrew/homebrew-cask/pull/70870

[kenpowers-signal]

They just merged the update. Everything should be working now.