add missing #[\ReturnTypeWillChange]#215

Caster000 wants to merge 1 commit intodocusign:masterdocusign/docusign-esign-php-client:masterfrom

Caster000:fix/214--missing-ReturnTypeWillChangeCaster000/docusign-esign-php-clientt:fix/214--missing-ReturnTypeWillChangeCopy head branch name to clipboard