Added Auto parameter to BSCol

[amunk]

The BSCol component has - according to the documentation - an Auto parameter that sets the css class "col-auto". The implementation is missing this parameter though. It has been added so that it is mutual exclusive with the Columns "col" class.

Unit tests have been added.

The commit also added a way to set the culture to unit tests using an attribute. Existing tests in BSInput with decimal numbers failed because of the local culture on my developing machine.

[jbomhold3]

Auto is also a property for Bootstrap 4 can you add it to that component as well so you get full credit when I mirage this

[amunk]

Implementation has been added to V4

[jbomhold3]

Thanks for the PR :)