Dependencies: Update express and test modules
Dependencies: Update express and test modules

Bump Express to the highest 4.x available,
and increment our test modules to be as
high as they can without running across
breaking changes.

secret-project/circle-blvd,holmwell/circle-blvd,holmwell/circle-blvd,holmwell/circle-blvd,secret-project/circle-blvd,secret-project/circle-blvd,holmwell/circle-blvd,secret-project/circle-blvd