build: update snekfetch requirement to ^4.0.1 (#2580)

Updates the requirements on [snekfetch](https://github.com/devsnek/snekfetch) to permit the latest version.
- [Release notes](https://github.com/devsnek/snekfetch/releases)
- [Commits](https://github.com/devsnek/snekfetch/commits)

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

package.json

@@ -36,7 +36,7 @@
   "dependencies": {
     "pako": "^1.0.0",
     "prism-media": "^0.2.0",
-    "snekfetch": "^3.6.0",
+    "snekfetch": "^4.0.1",
     "tweetnacl": "^1.0.0",
     "ws": "^4.0.0"
   },