Bump slickgrid from 4.0.1 to 5.9.1

Bumps [slickgrid](https://github.com/6pac/SlickGrid) from 4.0.1 to 5.9.1.
- [Release notes](https://github.com/6pac/SlickGrid/releases)
- [Changelog](https://github.com/6pac/SlickGrid/blob/master/CHANGELOG.md)
- [Commits](6pac/SlickGrid@4.0.1...5.9.1)

---
updated-dependencies:
- dependency-name: slickgrid
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

package.json

@@ -30,7 +30,7 @@
     "jquery-ui": "^1.13.3",
     "mousetrap": "^1.6.5",
     "q": "^1.5.1",
-    "slickgrid": "^4.0.1",
+    "slickgrid": "^5.9.1",
     "validator": "^13.11.0"
   },
   "peerDependencies": {