build: Bump devDependencies to latest

 grunt                 1.0.1  →  1.0.2
 grunt-banana-checker  0.4.0  →  0.6.0
 grunt-jsonlint        1.0.7  →  1.1.0

Change-Id: I694ae6778c4556615636acfdc07465f143e51041
1 file changed