Unify related types together in class SimilarTypes

[saytosid]

Issue number of the reported bug or feature request: #33

Describe your changes
Unified the list of related types -

attrs-strict/attrs_strict/_type_validation.py

Lines 53 to 67 in c8052d9

	if base_type in {set, list, typing.List, typing.Set}:
	_handle_set_or_list(attribute, value, expected_type)
	elif base_type in {
	dict,
	collections.OrderedDict,
	collections.defaultdict,
	Mapping,
	MutableMapping,
	typing.Dict,
	typing.DefaultDict,
	typing.Mapping,
	typing.MutableMapping,
	}:
	_handle_dict(attribute, value, expected_type)
	elif base_type in {tuple, typing.Tuple}:

Testing performed
This is a refactoring which should not have any functional change

Additional context
Split out from #25

[erikseulean]

Thank you. This looks great.

[erikseulean]

Hmm, I'm not sure what's happening with the continuous documentation.

[erikseulean]

The docs are being rebuilt successfully on the pR:

https://readthedocs.org/api/v2/build/11091145.txt

[erikseulean]

@kpfleming The continuous-documentation hook seems to be waiting for status indefinitely, but the build shows successful in readthedocs. I don't have access to check out the hook, would you mind checking it please ?

[erikseulean]

@gaborbernat any thoughts on the read-the-docs not getting back the update ?

[gaborbernat]

This goes with @kpfleming, seems there's a check mandated for merge... but that check was renamed from continuous-documentation/read-the-docs to docs/readthedocs.org:attrs-strict. Branch protection needs to be updated, but only @kpfleming has the rights to do so.

[kpfleming]

All set...

[erikseulean]

Thank you @kpfleming @saytosid ❤️