Define deprecation policy
Description
Define deprecation policy for muttlib functionalities.
Proposal
Document deprecation policy:
- How long should we maintain code to be backward compatible with a warning?
Implement coded needed to warn users about future deprecations.
Benefit
Muttlib users will be warned when functionalities they depend on become unavailable.
Beneficiaries
Muttlib users.
Acceptance criteria
This issue should be resolved by:
- Research sensible deprecation policies.
- Updating the docs to reflect such policies.
- Implement decorators/warning for such policies.
Notes
Leave it as it is.