Bump grunt from 1.3.0 to 1.5.3 in /src#521

dependabot[bot] wants to merge 1 commit intodevelopWirecloud/wirecloud:developfrom

dependabot/npm_and_yarn/src/grunt-1.5.3Wirecloud/wirecloud:dependabot/npm_and_yarn/src/grunt-1.5.3Copy head branch name to clipboard