Tkinter-layout-helpers

What's Changed
* Fixed annotations of context managers and helpers (https://github.com/insolor/tkinter-layout-helpers/issues/14)


**Full Changelog**: https://github.com/insolor/tkinter-layout-helpers/compare/0.2.0...0.3.0

What's Changed
This is the first pypi.org release of the project
* Name of the project changed to tkinter_layout_helpers
* Added a helper for `.pack()` layout
* Dropped support of Python 3.6
* Raw classes converted into `dataclasses`
* Some fields were protected (at least to remove them from IDE hints)

**Full Changelog**: https://github.com/insolor/tkinter_layout_helpers/compare/0.1.2...0.2.0

Add skip method to leave empty cells in the current row

Some useful improvements:
- Added row_configure method to Row
- Added configure method to Row to call grid_rowconfigure on the parent widget
- Changed priority of arguments passed to a grid method

The first release