Update grunt-usemin to 3.0.0 in package.json.
Update grunt-usemin to 3.0.0 in package.json.

S1SYPHOS/davidensinger.github.io,davidensinger/davidensinger.github.io,hellfish2/davidensinger.github.io,davidensinger/davidensinger.github.io,S1SYPHOS/davidensinger.github.io,davidensinger/davidensinger.github.io,S1SYPHOS/davidensinger.github.io,hellfish2/davidensinger.github.io