Configure default ObjectMapper with JavaTimeModule

[mark-henry]

Fixes #1127

• registers JavaTimeModule, "Class that registers capability of serializing java.time objects with the Jackson core." https://fasterxml.github.io/jackson-modules-java8/javadoc/datetime/2.9/com/fasterxml/jackson/datatype/jsr310/JavaTimeModule.html
• I recommend disabling SerializationFeature.WRITE_DATES_AS_TIMESTAMPS as explained here

[mark-henry]

I chose to put tests in ParametersTest.java. I hope that was the right choice.

The context is that I have never submitted a PR to an open source project so lmk if any feedback whee ty

[oleg-nenashev]

Looks good to me. The new library will be shaded by the existing relocate configuration

[mark-henry]

Exciting! If merged, what version would this be part of, and approximately when would that version be released?

[mark-henry]

@tomakehurst bump :)

[oleg-nenashev]

I will review open pull requests with @tomakehurst when we has sometime (or allows me to merge ready-to-go stuff )