Update maintainers.json (#1419)
Update maintainers.json (#1419)

Show @cmccandless (myself) on website.
N-Parsons/exercism-python,jmluy/xpython,exercism/xpython,exercism/python,behrtam/xpython,jmluy/xpython,smalley/python,exercism/xpython,smalley/python,exercism/python,N-Parsons/exercism-python,behrtam/xpython