Gravity Forms 2.8.11

- Fixed an issue which can cause providers to be registered more than one time on some hosting environments.
- Fixed an issue where the default value of an email field with confirmation enabled does not display.
- AF: Fixed a fatal error that can occur with PHP 8+ if an error occurs during background feed processing.
- API: Fixed an issue where GF_Field_Time::is_value_submission_empty() could return the wrong result.

- Fixed a fatal error that can occur on some hosting environments when the license is validated.

Gravity Form 2.6.4

### 2.6.4 | 2022-07-06
- Added the [gform_cleanup_target_dir](https://docs.gravityforms.com/gform_cleanup_target_dir/) filter to support async uploads on servers with opendir() disabled.
- Fixed an issue where the REST request to get additional pages fails on translated sites when configuring the form confirmation.
- Fixed an accessibility issue by adding an alert role to the notice on the uninstall page.
- Fixed an accessibility issue where the search field in the form detail has no connected label.
- Fixed several PHP 8.1 deprecation notices. Note: There are still a number of notices from WordPress 6.0.
- Updated the minimum WordPress version on the System Status page to 5.9.
- Updated the database upgrade and System Status page to check for and fix auto increment issues which can cause "duplicate entry 0" errors.
- AF: Updated `GFPaymentAddOn::maybe_validate()` to include `$context` as the second parameter.
- API: Added gform/merge_tag/initialize event to allow merge tag drop downs to be manually initialized after page load.
- API: Updated the REST API v2 [forms/[FORM_ID]/submissions](https://docs.gravityforms.com/submitting-forms-with-rest-api-v2/) endpoint to support the `?_validate_only=1` query argument.
- API: Added [GFAPI::validate_form()](https://docs.gravityforms.com/validating-forms-with-the-gfapi/) to validate form field values without triggering other submission events such as saving the entry, sending notifications, add-on feeds, or confirmations.
- API: Added the [forms/[FORM_ID]/submissions/validation](https://docs.gravityforms.com/validating-forms-with-rest-api-v2/) endpoint to REST API v2.
- API: Updated the `gform_field_validation` and `gform_validation` filters to include a new `$context` parameter indicating how the current request was triggered: form-submit, api-submit, or api-validate.