devel/pear-Pager: Update from 2.4.9 to 2.5.1

[joneum]

Summary

• devel/pear-Pager: Update from 2.4.9 to 2.5.1

-Add LICENSE

• Changelog: https://pear.php.net/package/Pager/download/

Approved by: xxx (mentor)
#Differential Revision: https://reviews.freebsd.org/Dxxxxx

Test Plan

~ % cd dev/ports/devel/pear-Pager/
joneum@phantomias:~/dev/ports/devel/pear-Pager % portlint -AC
WARN: Makefile: for new port, make $FreeBSD$ tag in comment section empty, to make SVN happy.
0 fatal errors and 1 warning found.

poudriere testport:

10amd64
10i386
11amd64
11i386
12.0-CURRENT r320266 amd64
12.0-CURRENT r320266 i386