Cleanups
Implementing locking for batch updates
API homogenization and cleanups
Bug fixes
Fixing catalog creation
Using the typecheck module for some key methods
Updating requirements.txt
Catalog locking cleanup and bug fixes
Adding delete_distribution wrapper
Deleting previous version
Updating toml
PEP8
Merge branch 'develop' into feature/basic-typechecking

Conflicts:
	src/zinc/catalog.py
Adding a type for delete_previous
Merge pull request #28 from mindsnacks/feature/basic-typechecking

Using the typecheck module for some key methods
Merge branch 'develop' into feature/fancy-output

Conflicts:
	src/zinc/cli.py