chore(package.json): update sauce-connect-launcher to v0.5.1
chore(package.json): update sauce-connect-launcher to v0.5.1

A few releases have passed since this was last upgraded, it would be good to keep this up to date with
the live service it works against.

jackTheRipper/karma-sauce-launcher,karma-runner/karma-sauce-launcher,matthewjh/karma-sauce-launcher,jerkovicl/karma-sauce-launcher,karma-runner/karma-sauce-launcher,jackspirou/karma-sauce-launcher