Add 'wheel' to requirements.txt

[antonwantstosleep]

Hi! I tried to say "pip3 install -r requirements.txt" on Linux Mint 19.3 x64 but got a "error: invalid command 'bdist_wheel'".

The solution is to say:

$ pip3 install wheel
$ pip3 uninstall -r requirements.txt
$ pip3 install -r requirements.txt