Added some filename fixes

[Emersont1]

Hopefully this will fix the issues in #28

Can you test it on the one it wasn't working on before with these fixes please

# clone the repo
git clone https://github.com/Emersont1/itchio

# checkout to filename-fixes
cd itchio
git checkout filename-fixes

# create and load a venv
python -m venv venv
source venv/bin/activate

# install
pip install .

# profit?
python -m itchiodl.downloader -k INSERT_API_KEY_HERE

[TheFrenchGhosty]

Tested, it now breaks on "nothing":

Skipping Game Staxter
Traceback (most recent call last):
  File "/home/user/.local/bin/itch-download", line 8, in <module>
    sys.exit(main())
  File "/home/user/.local/lib/python3.10/site-packages/itchiodl/downloader/__main__.py", line 31, in main
    lib.download_library()
  File "/home/user/.local/lib/python3.10/site-packages/itchiodl/library.py", line 35, in download_library
    game.download(self.login)
  File "/home/user/.local/lib/python3.10/site-packages/itchiodl/game.py", line 68, in download
    itchiodl.utils.download(url, path, self.name + " - " + file)
TypeError: download() missing 1 required positional argument: 'file'

[Emersont1]

can you try with the second commit, turns out I was a numpty with the changes

[TheFrenchGhosty]

@Emersont1 Worked perfectly!

[Emersont1]

smashing! I'll merge that in