needs support for macOS

[nkprince007]

Log message:

bash downloader.sh 
Enter Manga name:
one piece
downloader.sh: line 3: ${manga,,}: bad substitution
Enter the chapter range.
Start:
1
End:
1
Downloading page 1 of chapter 1.....
downloader.sh: line 46: $((length-1)): substring expression < 0

Check the expression cited above and fix it.

[abhay-raizada]

hey do you think this would help? https://github.com/NIT-dgp/manga/issues/23 once this is fixed mac would automatically get supported right? though i guess keep this issue open so we are reminded to test :D

[nkprince007]

Yeah, the python script should definitely fix that.