Add support for other file name

[yswtrue]

Is your feature request related to a problem? Please describe.
When I use cookiecutter-Django the requirement.txt file is split into 3 files. So this extension can't work. Hope it can support other file names.

Describe the solution you'd like
Hope this extension can check by language mode not only the file name.

Describe alternatives you've considered
A clear and concise description of any alternative solutions or features you've considered.

Additional context
Add any other context or screenshots about the feature request here.

[copdips]

currently for python project, this extension works only for file with the name requirements.txt, is it possible check the language mode to determine which manifest the file base on ?