wp-plugin-installer/docs/_configuration.md

Configuration

Class configuration is done by overriding the set_defaults() method. This method is called by the constructor, so you can safely use $this-> in it.

protected function set_defaults() {
  $this->name          = 'My Plugin';
  $this->slug          = 'my-plugin';
  $this->version       = '1.0.0';    
  $this->db_version    = '1.0.0';    
  $this->has_db_tables = true;       
}

name

The plugin name.
This is used mainly for Admin notices

?> This can be safely changed at any time.

slug

The plugin slug.
This is used for the plugin's option names, and hooks in the installer class

!> Changing the slug after the plugin has been installed will cause the plugin to be reinstalled.

version

The plugin version.
This is used in order to determine if the plugin needs to be updated.

?> You can define this either by using an external constant, or by hardcoding it in the installer class.

db_version

The database schema version. Database schema version is used in order to determine if the database schema needs to be updated. Incrementing this value will run the update callbacks

has_db_tables

Whether the plugin has database tables. If this is set to true, the installer will create and update the database tables.

?> If you set this to true, you need to implement the get_schema() method - since by default it returns an empty string.