Bump mathjs from 8.1.0 to 8.1.1

Bumps [mathjs](https://github.com/josdejong/mathjs) from 8.1.0 to 8.1.1.
- [Release notes](https://github.com/josdejong/mathjs/releases)
- [Changelog](https://github.com/josdejong/mathjs/blob/develop/HISTORY.md)
- [Commits](josdejong/mathjs@v8.1.0...v8.1.1)

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

package.json

@@ -31,7 +31,7 @@
     "file-type": "^16.1.0",
     "form-data": "^3.0.0",
     "fs-extra": "^9.0.1",
-    "mathjs": "^8.1.0",
+    "mathjs": "^8.1.1",
     "moment-timezone": "^0.5.31",
     "ms": "^2.1.3",
     "needle": "^2.5.2",