Update for using mailvelope with gpg installed via homebrew on macOS running on Apple Silicon

[Felix Hammerl]

Hi @toberndo ,

There is actually no need to do anything special when installing via brew install gpg gpgme, which is comfortable.

I figured I'd create a quick update to the GPG installation instructions when installing via homebrew on macOS running on Apple Silicon, as some paths are different. The gpgmejson.json looks slightly different:

Firefox:

> cat ~/Library/Application\ Support/Mozilla/NativeMessagingHosts/gpgmejson.json
{
    "name": "gpgmejson",
    "description": "Integration with GnuPG",
    "path": "/opt/homebrew/bin/gpgme-json",
    "type": "stdio",
    "allowed_extensions": [
        "jid1-AQqSMBYb0a8ADg@jetpack"
    ]
}

Chrome:

> cat ~/Library/Application\ Support/Google/Chrome/NativeMessagingHosts/gpgmejson.json
{
    "name": "gpgmejson",
    "description": "Integration with GnuPG",
    "path": "/opt/homebrew/bin/gpgme-json",
    "type": "stdio",
    "allowed_origins": [
        "chrome-extension://kajibbejlbohfaggdiogboambcijhkke/"
    ]
}

Maybe add a reminder that it must be named gpgmejson.json, in accordance with the name property.

You also need to add /opt/homebrew/bin to launchd.

> sudo launchctl config system path /opt/homebrew/bin:/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin
> sudo launchctl config user path /opt/homebrew/bin:/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin

Then restart the system.