* POST instead of PATCH for invite accept test
* Replace Jest JSDOM environment
Using `jest-environment-jsdom-global` didn't seem to bring any used advantages over the default `jest-environment-node`
* remove mockdate, use modern jest fake timers
* update package lock
Co-authored-by: Rijk van Zanten <rijkvanzanten@me.com>
Co-authored-by: Jay Cammarano <67079013+jaycammarano@users.noreply.github.com>