Bump jszip from 2.6.0 to 3.7.0

Bumps [jszip](https://github.com/Stuk/jszip) from 2.6.0 to 3.7.0.
- [Release notes](https://github.com/Stuk/jszip/releases)
- [Changelog](https://github.com/Stuk/jszip/blob/master/CHANGES.md)
- [Commits](Stuk/jszip@v2.6.0...v3.7.0)

---
updated-dependencies:
- dependency-name: jszip
  dependency-type: direct:production
...

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

package.json

@@ -43,7 +43,7 @@
     "file-saver": "^1.3.3",
     "fs-extra": "3.0.1",
     "html-webpack-plugin": "2.29.0",
-    "jszip": "^2.6.0",
+    "jszip": "^3.7.0",
     "katex": "^0.8.2",
     "mathjax": "^2.7.2-rc",
     "moment": "^2.24.0",