Bump grunt from 1.0.1 to 1.5.3 in /tooltipster

Bumps [grunt](https://github.com/gruntjs/grunt) from 1.0.1 to 1.5.3.
- [Release notes](https://github.com/gruntjs/grunt/releases)
- [Changelog](https://github.com/gruntjs/grunt/blob/main/CHANGELOG)
- [Commits](gruntjs/grunt@v1.0.1...v1.5.3)

---
updated-dependencies:
- dependency-name: grunt
  dependency-type: direct:development
...

Signed-off-by: dependabot[bot] <[email protected]>

tooltipster/package.json

@@ -9,7 +9,7 @@
 	},
 	"description": "A flexible and extensible jQuery plugin for modern tooltips.",
 	"devDependencies": {
-		"grunt": "1.0.1",
+		"grunt": "1.5.3",
 		"grunt-contrib-clean": "1.0.0",
 		"grunt-contrib-compress": "1.2.0",
 		"grunt-contrib-concat": "1.0.1",