sysutils/backuppc4: Update to 4.1.3

While here, removing -[0-9]* from CONFLICTS

Changes: https://github.com/backuppc/backuppc/releases/tag/4.1.3

PR: 219816
Submitted by: Alexander Moisseev <moiseev@mezonplus.ru> (maintainer)
Approved by: garga (mentor)
Differential Revision: https://reviews.freebsd.org/D11079