Update jsdom to v16 to fix potential security vulnerabilities

Author: domchristie

package-lock.json

@@ -10,7 +10,7 @@
     "jsdom": false
   },
   "dependencies": {
-    "jsdom": "^11.9.0"
+    "jsdom": "^16.2.0"
   },
   "devDependencies": {
     "browserify": "^16.2.3",
@@ -19,7 +19,7 @@
     "rollup-plugin-node-resolve": "^3.0.0",
     "rollup-plugin-replace": "^2.0.0",
     "standard": "^10.0.3",
-    "turndown-attendant": "0.0.2"
+    "turndown-attendant": "0.0.3"
   },
   "files": [
     "lib",