Log Message:
gpgme: updated to 1.15.1

Noteworthy changes in version 1.15.1 (2021-01-08)
-------------------------------------------------
 * Fix another bug in the secret key export.
 * Make listing of signatures work if only secret keys are listed.
 * Fix build problem on FreeBSD.
 * qt: Avoid empty "rem@gnupg.org" signature notations.
 * python: Fix key_export functions.

Noteworthy changes in version 1.15.0 (2020-11-12)
-------------------------------------------------
 * New function gpgme_op_setexpire to make changing the expiration
   easier (requires GnuPG 2.1.22).
 * New function gpgme_op_revsig to revoke key signatures (requires
   GnuPG 2.2.24).
 * Support exporting secret keys.
 * cpp: Support for set expire operations in the C++ bindings.
 * cpp: Support for revoking key signatures in the C++ bindings.
 * qt: Extended ChangeExpiryJob to support changing the expiry of
   subkeys.
 * qt: Extended QuickJob to support revoking of key signatures.
 * qt: Added QDebug stream operator for GpgME::Error.
 * Require a somewhat newer version of libgpg-error (1.36).
 * Interface changes relative to the 1.14.0 release:
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 gpgme_op_setexpire_start                   NEW.
 gpgme_op_setexpire                         NEW.
 gpgme_op_revsig_start                      NEW.
 gpgme_op_revsig                            NEW.
 GPGME_REVSIG_LFSEP                         NEW.
 cpp: Context::setExpire                    NEW.
 cpp: Context::startSetExpire               NEW.
 cpp: EngineInfo::Version::operator<=       NEW.
 cpp: EngineInfo::Version::operator>=       NEW.
 cpp: EngineInfo::Version::operator!=       NEW.
 cpp: StatusConsumer                        NEW.
 cpp: StatusConsumerAssuanTransaction       NEW.
 cpp: Context::cancelPendingOperationImmediately NEW.
 cpp: Context::revokeSignature              NEW.
 cpp: Context::startRevokeSignature         NEW.
 cpp: UserID::Signature::operator<          NEW.
 qt: operator<<(QDebug debug, const GpgME::Error &err) NEW.
 qt: QuickJob::startRevokeSignature         NEW.
 qt: QuickJob::result                   CHANGED: Made params 'auditLogAsHtml'
                                                and 'auditLogError' optional.