Bump grunt-banner to ^0.6.0
Bump grunt-banner to ^0.6.0

freezy-sk/bootlint,2947721120/ubiquitous-octo-kumquat,chrismbarr/bootlint,2947721120/ubiquitous-octo-kumquat,freezy-sk/bootlint,freezy-sk/bootlint,twbs/bootlint,chrismbarr/bootlint,twbs/bootlint,2947721120/ubiquitous-octo-kumquat,chrismbarr/bootlint