Compatibility with pytest-django 3.7.x

[stevecj]

Currently, pytest-tipsi-django requires pytest-django==3.6.*, but we are using 3.7.0. Do you have the time to update this package to support pytest-django 3.7.0 soon?

I was going to try to do that myself, but I have not yet been able to get the test environment set up quite right.

[cybergrind]

@stevecj oh, will update it to less strict requirement

[cybergrind]

Uploaded as 2.4.0