update check_version to {3,0,0} - #18

Hi,

Will the scripts still work with older dt versions?

If not:
My copy_attach_detach_tags works since API 2.

So setting check_version to something like this
dt.configuration.check_version(...,{2,0,0},{3,0,0})
will be more appropriate?

Christian

yes, if you don't change anything you should append the newly tested api version at the end of the list of tested versions, not replace the list....

did you check the scripts entirely ? the main non-compatibility is that calls to yield now MUST have the type of yield parameter written in upper case

I will close this pull requests since we are checking scripts one by one... thx for the work anyway...