fix: package.json to reduce vulnerabilities

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-JS-FORMDATA-10841150

Author: snyk-bot

package.json

@@ -19,7 +19,7 @@
     "jquery": "^1.11.3",
     "js-cookie": "^2.1.0",
     "linkstate": "^1.1.1",
-    "parcel": "^1.12.3",
+    "parcel": "^2.0.0",
     "postcss-assets": "^5.0.0",
     "preact": "^8.4.2",
     "preact-context": "^1.1.3",