Update growl to 1.10.3

[dpogue]

Description of the Change

Update growl to 1.10.3

Why should this be in core?

This avoid a warning about an eslint peerDependency on install of mocha:

eslint-plugin-node@5.2.0 requires a peer of eslint@>=3.1.0 but none is installed.

[jsf-clabot]

All committers have signed the CLA.

[coveralls]

Coverage increased (+0.05%) to 89.674% when pulling 8b3c687 on dpogue:patch-1 into 0cdd921 on mochajs:master.

[boneskull]

@dpogue thanks!