Bump mathjs from 6.6.5 to 7.5.1

Bumps [mathjs](https://github.com/josdejong/mathjs) from 6.6.5 to 7.5.1.
- [Release notes](https://github.com/josdejong/mathjs/releases)
- [Changelog](https://github.com/josdejong/mathjs/blob/develop/HISTORY.md)
- [Commits](josdejong/mathjs@v6.6.5...v7.5.1)

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

Author: dependabot[bot]

package-lock.json

@@ -39,7 +39,7 @@
   "homepage": "https://quantum-circuit.com",
   "dependencies": {
     "antlr4": "4.7.2",
-    "mathjs": "^6.0.3"
+    "mathjs": "^7.5.1"
   },
   "devDependencies": {
     "browserify": "^16.5.1",