[$] A bunch of releases from the Pallets projects

May 11 marked a new major release for the Python-based Flask webmicroframework project, but Flask 2.0was only part of the story. While the framework may be the most visiblepiece, it is one of a small handful of cooperating libraries that providesolutions for various web-development tasks; all are incorporated into the Pallets projects organization. Forthe first time, allsix libraries that make up Pallets were released at the same time andeach had a new major version number. In part, that new major versionindicated that Python 2 support was being left behind, but there isplenty more that went into the coordinated release.