The regular expressions should search case insensitive

Some resource options accept regular expressions
https://github.com/box/wavectl/blob/master/doc/CommandReference.md#resource-options

Those regular expressions should be case insensitive.
Since the implementation is re module in python using https://docs.python.org/2.7/library/re.html#re.IGNORECASE should be enough.

From the user's point of view, I really doubts anyone cares that the regular expressions are case sensitive. It makes the regular expression search more difficult to use.