fix: package.json to reduce vulnerabilities
fix: package.json to reduce vulnerabilities

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/npm:http-signature:20150122

Latest report for openolitor/openolitor-client-kundenportal:
https://snyk.io/test/github/openolitor/openolitor-client-kundenportal
OpenOlitor/openolitor-client-kundenportal,OpenOlitor/openolitor-client-kundenportal,OpenOlitor/openolitor-client-kundenportal