Tkcomponents

- Updated objectextensions dependency
- Reordered members of Gridhelper for clarity

No breaking changes.

- Renamed update_interval and duration variables to include their units (ms)

- Added Component.update()
- Updated dependency

- From v1.0.0 onwards, this package will follow SemVer
- Dependencies are now correctly pinned

- Misc variables have been changed from protected to public
- Added _apply_dividers method to GridHelper
- Updates to type hinting and comments

May introduce minor breaking changes in edge cases.

- Added LabelWrapper, a basic wrapper for Label with the additional functionality Component provides (in particular, an update loop)