Update mathjs requirement from ^5.10.3 to ^6.0.1 (#33)

Updates the requirements on [mathjs](https://github.com/josdejong/mathjs) to permit the latest version.
- [Release notes](https://github.com/josdejong/mathjs/releases)
- [Changelog](https://github.com/josdejong/mathjs/blob/develop/HISTORY.md)
- [Commits](https://github.com/josdejong/mathjs/compare/v5.10.3...v6.0.1)

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

package.json

@@ -39,7 +39,7 @@
 		"discord.js-commando": "github:discordjs/Commando",
 		"dotenv": "^8.0.0",
 		"gifencoder": "^2.0.1",
-		"mathjs": "^5.10.3",
+		"mathjs": "^6.0.1",
 		"moment": "^2.24.0",
 		"moment-duration-format": "^2.3.2",
 		"moment-timezone": "^0.5.25",