Textspitter

patching TextSpitter.core to explicitly convert filename contents into File objects

What's Changed
* Bump lxml from 4.6.4 to 4.6.5 by dependabot in https://github.com/fsecada01/TextSpitter/pull/6

New Contributors
* dependabot made their first contribution in https://github.com/fsecada01/TextSpitter/pull/6

**Full Changelog**: https://github.com/fsecada01/TextSpitter/compare/0.3.6...0.3.7b0

Fix for extracting string content from text files. Typo fix in README.

- Requirements Updates
- Moved utility functions into class wrapper