kiss-headers is a basic library, small and concise to help get things done
regarding headers in a better way.

Features:
* A backwards-compatible syntax using bracket style.
* Capability to alter headers using simple, human-readable operator
  notation + and -.
* Flexibility if headers are from an email or HTTP, use as you need with one
  library.
* Ability to parse any object and extract recognized headers from it, it also
  supports UTF-8 encoded headers.
* Fully type-annotated.
* Provide great auto-completion in Python interpreter or any capable IDE.
* No dependencies. And never will be.
* 90% test coverage.