Merge pull request #1972 from gridstack/dependabot/npm_and_yarn/grunt-1.5.3

Bump grunt from 1.5.2 to 1.5.3

Author: adumesny

yarn.lock

@@ -2650,9 +2650,9 @@ grunt-sass@3.1.0:
   integrity sha512-90s27H7FoCDcA8C8+R0GwC+ntYD3lG6S/jqcavWm3bn9RiJTmSfOvfbFa1PXx4NbBWuiGQMLfQTj/JvvqT5w6A==
 
 grunt@^1.0.4:
-  version "1.5.2"
-  resolved "https://registry.yarnpkg.com/grunt/-/grunt-1.5.2.tgz#46b014e28d17c85baac19d5e891bb3f04923c098"
-  integrity sha512-XCtfaIu72OyDqK24MjWiGC9SwlkuhkS1mrULr1xzuJ2XqAFhP3ZAchZGHJeSCY6mkaOXU4F7SbmmCF7xIVoC9w==
+  version "1.5.3"
+  resolved "https://registry.yarnpkg.com/grunt/-/grunt-1.5.3.tgz#3214101d11257b7e83cf2b38ea173b824deab76a"
+  integrity sha512-mKwmo4X2d8/4c/BmcOETHek675uOqw0RuA/zy12jaspWqvTp4+ZeQF1W+OTpcbncnaBsfbQJ6l0l4j+Sn/GmaQ==
   dependencies:
     dateformat "~3.0.3"
     eventemitter2 "~0.4.13"