Bump mathjs from 6.6.5 to 7.0.0 (#50)

Bumps [mathjs](https://github.com/josdejong/mathjs) from 6.6.5 to 7.0.0.
- [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/v6.6.5...v7.0.0)

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

Co-authored-by: dependabot-preview[bot] <27856297+dependabot-preview[bot]@users.noreply.github.com>

package.json

@@ -44,7 +44,7 @@
 		"discord.js-commando": "github:discordjs/Commando",
 		"dotenv": "^8.2.0",
 		"gifencoder": "^2.0.1",
-		"mathjs": "^6.6.5",
+		"mathjs": "^7.0.0",
 		"moment": "^2.25.3",
 		"moment-duration-format": "^2.3.2",
 		"moment-timezone": "^0.5.28",