WPForms Conversational Forms Addon 1.15.0

### Added
- Compatibility with the upcoming WPForms 1.8.8.

### Fixed
- Payment single item overlap in case of long label.

### Added
- Compatibility with the upcoming WPForms 1.8.7.

### Changed
- The minimum WPForms version supported is 1.8.7.

### Fixed
- The Form Builder settings screen had visual issues when an RTL language was used.

1.13.0