Set upper bounds for setuptools and wheel-filename

[mghantous]

This PR adds upper bounds to the setuptools and wheel-filename dependencies in core-requirements.txt to prevent installation of incompatible versions:

• setuptools is capped at <82 because version 82 drops pkg_resources.
• wheel-filename is capped at <2 because version 2 breaks imports of InvalidFilenameError and parse_wheel_filename.

Note: I have fixes to remove the upper bounds in another PR, however it failed coverage and I didn't like the fact that I still had to set an upper bound for CI (due to devpi-server's devpi-init): #228

If someone would like to take over that other PR, then by all means, please do.

Also PS: Please push latest releases to pypi! Thank you.

[coveralls]

coverage: 97.512%. remained the same
when pulling 842f063 on addgene:mg/upper-bound-packages
into cd31808 on blue-yonder:master.

[matthias-bach-by]

Thanks!