chore(package): use empower node-0_11_x branch for testing
chore(package): use empower node-0_11_x branch for testing

yagitoshiro/power-assert,twada/power-assert,yagitoshiro/power-assert,saneyuki/power-assert,saneyuki/power-assert,power-assert-js/power-assert,twada/power-assert,falsandtru/power-assert,falsandtru/power-assert,power-assert-js/power-assert