Bump datatables.net-buttons from 3.0.2 to 3.1.1

Bumps [datatables.net-buttons](https://github.com/DataTables/Dist-DataTables-Buttons) from 3.0.2 to 3.1.1.
- [Release notes](https://github.com/DataTables/Dist-DataTables-Buttons/releases)
- [Commits](DataTables/Dist-DataTables-Buttons@3.0.2...3.1.1)

---
updated-dependencies:
- dependency-name: datatables.net-buttons
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

package.json

@@ -8,7 +8,7 @@
   "dependencies": {
     "datatables.net": "2.0.8",
     "datatables.net-bs5": "2.1.3",
-    "datatables.net-buttons": "3.0.2",
+    "datatables.net-buttons": "3.1.1",
     "datatables.net-buttons-bs5": "3.1.1",
     "datatables.net-colreorder": "2.0.3",
     "datatables.net-colreorder-bs5": "2.0.3",