[Feature]: Allow additional args for exodiff function

[JTHesse]

I would like to use the exodiff function with additional arguments.
For example:

exodiff("file1.e", "file2.e"; args=["-ignore maps","..."])

This will allow utilizing more functionalities that are provided by exodiff.

[cmhamel]

The syntax I added to the referenced PR is the following

exodiff("file1.e", "file2.e", ["-Help"])

it's almost what you suggested but without the keyword argument.

[JTHesse]

Awesome, thank you very much!