Client is not compatible with Jackson 2.20+

[lbenedetto]

Describe the bug https://github.com/ActiveCampaign/postmark-java/blob/f8a36202fb8fedc5be779bfa9326743088605e81/src/main/java/com/postmarkapp/postmark/client/data/parser/DataHandler.java#L20

java.lang.NoSuchFieldError: Class com.fasterxml.jackson.databind.PropertyNamingStrategy does not have member field 'com.fasterxml.jackson.databind.PropertyNamingStrategy UPPER_CAMEL_CASE'
	at com.postmarkapp.postmark.client.data.parser.DataHandler.<init>(DataHandler.java:20)
	at com.postmarkapp.postmark.client.data.parser.DataHandler.<init>(DataHandler.java:25)
	at com.postmarkapp.postmark.client.HttpClientHandler.<init>(HttpClientHandler.java:20)
	at com.postmarkapp.postmark.client.BaseApiClient.<init>(BaseApiClient.java:18)
	at com.postmarkapp.postmark.client.ApiClient.<init>(ApiClient.java:55)
	at com.postmarkapp.postmark.Postmark.getApiClient(Postmark.java:62)

PropertyNamingStrategy is deprecated and replaced with PropertyNamingStrategies

There are many other dependencies in this library which are several years out of date, including some with security issues. This project unfortunately seems abandoned.

[elijulian]

running into the same issue

[elijulian]

added a PR: https://github.com/ActiveCampaign/postmark-java/pull/73/files

[elijulian]

response that i got from postmark customer support on this

[jlannoy]

Such answer is a shame. While it's not a bug, not maintaining a library can open vulnerabilities ; that would have severe impacts too. Thank you for trying, offering the immediate solution through a PR.