release/7.7.1

We are pleased to announce the release of version 7.7.1
of the Cooperative Computing Tools from the University of Notre Dame,
including TaskVine, Work Queue, Makeflow, Parrot, Chirp, and other software.

Docs: https://cctools.readthedocs.io/
Download: http://ccl.cse.nd.edu/software/download
Forum: http://ccl.cse.nd.edu/community/forum

This is a minor bug-fix release:

What's Changed

• WQ-Parsl coprocess fix by @tphung in #3542
• Doc fixes by @dthain in #3544