Craft installation breaks when this is installed in project config

[myleshyson]

Description

Just updated to Craft 5.3.4 and noticed my test suite started failing because of a schema version validation error for the store-hours plugin because of this change.

The project config tries to validate the schema version of the plugin by referencing it's $schemaVersion property. However that property is blank on this plugin. I think $schemaVersion just needs to be added to the Plugin class with the current version.

• Craft version: 5.3.4
• PHP version: 8.2
• Database driver & version:
• Plugin Version: 4.2.0

[myleshyson]

Thought I should note, I'm also experiencing this bug in installing craft fresh outside of a test context when this plugin is included in the project config.