🐛 Fix not awaiting BigQuery addEventFilter

[sadlowskij]

Proposed Changes

This addresses an issue, where providing a async function for addEventFilter in the BigQueryAnalyticsPluginConfig, see here, never filters out the event, as it is not awaiting the result but treating the returned Promise as truthy

Types of Changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist

• My code follows the code style of this project
• My change requires a change to the documentation
• I have updated the documentation accordingly
• I have added tests to cover my changes
• All new and existing tests passed