Security vulnerability in dependency fast-json-patch

[ahochsteger]

According to npm audit the dependency fast-json-patch has a security vulnerability which can be fixed by upgrading to the latest version 3.1.1:

$ npm audit
# npm audit report

fast-json-patch  <3.1.1
Severity: moderate
Starcounter-Jack JSON-Patch Prototype Pollution vulnerability - https://github.com/advisories/GHSA-8gh8-hqwg-xf34

[josundt]

Please fix!

[G-Rath]

This is a duplicate of #225, and also will be resolved by #227