Deprecated method `fitSize()` has been removed

BREAKING CHANGE: fitSize() has been removed after being deprecated for 10 months. sizeToFit(:FitType) should now be used instead. See Adjusting size.

Plus:

• Refactor relative positioning methods source code (above(...), after(...), ...) using a default parameter value for the alignment parameter.

• Fix unit test screen density.

• Update few examples source code.

• Added by Luc Dion in Pull Request #167