Update read_text to use specified encoding (self._encoding|encoding)

[FredHappyface]

Description

Update read_text to use specified encoding (self._encoding|encoding). After running tests looks like some additional work needs doing to have things run on windows. Happy to mark this WIP and work on that now or in a future pr if you'd prefer?

Fixes #16

Type of change

• Bug fix (non-breaking change which fixes an issue)

Checklist:

• Pylint checks are passing
• Mypy checks are passing
• I have performed a self-review of my own code
• I added docstring to new modules, classes and public methods -> N/A
• I have added tests that prove my fix is effective or that my feature works -> tested locally - not sure how best to write platform specific tests here
• New and existing unit tests pass locally with my changes -> NO: 14 failed, 99 passed
• Any dependent changes have been merged and published in downstream modules -> N/A

Pytest Output

==================================================== short test summary info ==================================================== 
FAILED tests/test_generator.py::TestGenerator::test_generate_doc - AssertionError: expected call not found.
FAILED tests/test_generator.py::TestGenerator::test_generate_docs - AssertionError: expected call not found.
FAILED tests/test_generator.py::TestGenerator::test_init - AssertionError: expected call not found.
FAILED tests/test_main.py::TestMain::test_main - AssertionError: expected call not found.
FAILED tests/test_md_document.py::TestMDDocument::test_add_toc_if_not_exists - PermissionError: [Errno 13] Permission denied: '...
FAILED tests/test_md_document.py::TestMDDocument::test_append - handsdown.utils.path_finder.PathFinderError: Root path \ is not...
FAILED tests/test_md_document.py::TestMDDocument::test_append_title - handsdown.utils.path_finder.PathFinderError: Root path \ ...
FAILED tests/test_md_document.py::TestMDDocument::test_context_manager - PermissionError: [Errno 13] Permission denied: 'C:\\Us...
FAILED tests/test_md_document.py::TestMDDocument::test_generate_toc_section - handsdown.utils.path_finder.PathFinderError: Root...
FAILED tests/test_md_document.py::TestMDDocument::test_init - PermissionError: [Errno 13] Permission denied: 'C:\\Users\\<user>\\...
FAILED tests/test_md_document.py::TestMDDocument::test_render_doc_link - handsdown.utils.path_finder.PathFinderError: Root path...
FAILED tests/test_md_document.py::TestMDDocument::test_render_md_doc_link - handsdown.utils.path_finder.PathFinderError: Root p...
FAILED tests/utils/test_init.py::TestUtils::test_render_asset - TypeError: render_asset() missing 1 required positional argumen...
FAILED tests/utils/test_path_finder.py::TestPathFinder::test_relative - handsdown.utils.path_finder.PathFinderError: Root path ...
================================================= 14 failed, 99 passed in 2.00s ================================================= 

[vemel]

Thank you for your PR. Even though I have already added similar changes, thanks to your PR, I found one more place where encoding should be added. Output files now should respect encoding as well.

I am going to close your PR and prepare a new release. Thanks a lot for your help and time!