Fix inheritance safe subclasses

[falvaradorodriguez]

Closes #972

There was a problem when passing parameters to the __new__ method of the superclass in the constructor of the Safe class. These parameters must be passed in the __init__ method but not in the __new__ method.

If you directly instantiated a class that inherits from Safe, such as SafeV141, instead of passing it through the __new__ constructor of the Safe class, the same problem occurred.

A test case is added to validate the explicit condition in the Safe class constructor.

[coveralls]

Pull Request Test Coverage Report for Build 9289626205

Details

• 14 of 14 (100.0%) changed or added relevant lines in 2 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+0.05%) to 93.539%

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Totals
Change from base Build 9158604981:	0.05%
Covered Lines:	8049
Relevant Lines:	8605

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💛 - Coveralls

[Uxio0]

Really nice job and Python understanding to implement this fix