Dependabot tries to upgrade com.github.librepdf:openpdf from 1.3.40 to 1.4.1, see https://github.com/nuxeo/nuxeo-lts/pull/1752, but it's breaking the signature module with:
[ERROR] /home/jenkins/workspace/nuxeo_lts_nuxeo_PR-1752/modules/platform/nuxeo-signature/nuxeo-platform-signature-core/src/main/java/org/nuxeo/ecm/platform/signature/core/sign/SignatureServiceImpl.java:[507,49] cannot find symbol symbol: method getSignatureNames() location: variable acroFields of type com.lowagie.text.pdf.AcroFields
The getSignatureNames() method is deprecated in 1.3.40, recommending to use AcroFields#getSignedFieldNames(). Let's try to use it with the the 1.4.1 library.