Update for GNOME 42

[josephlbarnett]

Extension doesn't work in gnome 42.beta. Manually adding 42 to the metadata.json still fails, complaining that this._actions.get(...) is undefined:

Some code accessed the property 'LOCK_ORIENTATION_ACTION_ID' on the module 'systemActions'. That property was defined with 'let' or 'const' inside the module. This was previously supported, but is not correct according to the ES6 standard. Any symbols to be exported from a module must be defined with 'var'.  The property access will work as previously for the time being, but please fix your code anyway.
JS ERROR: Extension [email protected]: TypeError: this._actions.get(...) is undefined
                                           _override_system_actions/this._system_actions._updateOrientationLock@/home/.../.local/share/gnome-shell/extensions/[email protected]/extension.js:123:27
                                           _override_system_actions@/home/.../.local/share/gnome-shell/extensions/[email protected]/extension.js:126:30
                                           ScreenAutorotate@/home/.../.local/share/gnome-shell/extensions/[email protected]/extension.js:106:14
                                           enable@/home/.../.local/share/gnome-shell/extensions/[email protected]/extension.js:193:21
                                           _callExtensionEnable@resource:///org/gnome/shell/ui/extensionSystem.js:182:32
                                           loadExtension@resource:///org/gnome/shell/ui/extensionSystem.js:364:26
                                           _loadExtensions/<@resource:///org/gnome/shell/ui/extensionSystem.js:620:18
                                           collectFromDatadirs@resource:///org/gnome/shell/misc/fileUtils.js:27:28
                                           _loadExtensions@resource:///org/gnome/shell/ui/extensionSystem.js:595:19
                                           _enableAllExtensions@resource:///org/gnome/shell/ui/extensionSystem.js:626:18
                                           _sessionUpdated@resource:///org/gnome/shell/ui/extensionSystem.js:646:14
                                           init@resource:///org/gnome/shell/ui/extensionSystem.js:56:14
                                           _initializeUI@resource:///org/gnome/shell/ui/main.js:293:22
                                           start@resource:///org/gnome/shell/ui/main.js:170:5
                                           @resource:///org/gnome/shell/ui/init.js:6:17

(I thought this extension might not be needed in 42 based on gnome gitlab chatter, but still not seeing rotation work on my device)