www/py-rfc3986: Update to 1.0.0

Changes: https://rfc3986.readthedocs.io/en/latest/release-notes/1.0.0.html

PR: 219205
Submitted by: Yuri Victorovich <yuri@rawbw.com> (maintainer)
Approved by: garga (mentor)
Differential Revision: https://reviews.freebsd.org/D10688