Updated engine to 16, installed node-modules, ran tests

Test Suites: 22 passed, 22 total
Tests:       560 passed, 560 total
Snapshots:   308 passed, 308 total
Time:        19.182 s
Ran all test suites.

Change-type: patch

Author: zoobot

package.json

@@ -17,8 +17,8 @@
     "README.md"
   ],
   "engines": {
-    "node": ">=12.0.0",
-    "npm": ">=5.10.0"
+    "node": "^16.13.0",
+    "npm": "^8.1.1"
   },
   "scripts": {
     "tsify-css": "node ./scripts/tsifyCss.js",