chore: remove usage of deprecated .defaultProps

[tourman]

This PR:

• removes usage of deprecated .defaultProps from all components
• replaces getElementType() with getComponentType() as getElementType() relied on presence of .defaultProps
• updates unit tests to not use .defaultProps

Fixes #4426.

---

@layershifter please take a look at the basic changes on #4426. If you are fine with them, I'll proceed with the tests. You can review it with the hidden whitespace.

• The entries of .defaultProps are replaced with function getDefaultProps() to ensure minimum code changes. As the linter rule no-use-before-define forbids using functions before their declarations, I've taken the rule using eslint --print-config and modified it to pass the validation.
• Instead of using the default arguments, I've suggested the solution with _.defaults as the props may be used in children functions/components.

[tourman]

@layershifter oh I see now, that you'd prefer _.defaults instead of just defaults style, using Lodash.

[layershifter]

@tourman thanks for contributing ❤️ It's one of the issue that prevents me from shipping the next beta. However, I am more leaning towards changes proposed in #4426 (comment). To me getDefaultProps() and _.defaults() looks like additional complexity and code debt. WDYT?

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (e243fa4) 99.51% compared to head (77f7953) 99.50%.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #4449      +/-   ##
==========================================
- Coverage   99.51%   99.50%   -0.01%     
==========================================
  Files         186      186              
  Lines        3512     3466      -46     
==========================================
- Hits         3495     3449      -46     
  Misses         17       17              

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.