[make:entity] Entity Names Should Be Allowed to Have Digits (i.e. v1)

[jakeschroeder-fountaindigital]

Steps to reproduce:

• Use make:entity with a namespaced classname that includes a digit (i.e., Foo\v1\Bar)
• Observe ASCII error

maker-bundle/src/Maker/MakeEntity.php

Line 832 in 6960c1c

return preg_match('/^[a-zA-Z\\\\]+$/', $entityName);

Replace regex in line 832
Old = ^[a-zA-Z\\\\]+$
New = ^[a-zA-Z\\\d]+$

Removes duplicated \ (escaped "") and adds digit as allowable character.

[Sayanel34]

I went from 1.39 to 1.59 and experienced this.
I went down to 1.56 for now and it works again without this error.
Hope it will get fixed, we still need number in namespace for now.