1.0.6: Typehints, fixes and cleanup

BREAKING CHANGES:

• Rename every class attribute to respect lower_case_with_underscores
• Minimal Python version is now 3.8.0 (due to typehints)

New:

• Add tnt_resistance attribute to the Item class
• Add typehints to every class and function

Other:

• Clean up documentation
• Clean up the whole code
• Fix some misleading regex patterns