* Adding unit test
* Decode entire request to strongly typed Method call. This allows NotRequired parameters to properly decode from null, which wouldn't be possible when decoding from the 'null' JSON encoding directly.
* Add unit test to check that AnyRequest handles missing parameters
* Conform Value to NotRequired
* Add test for decoding AnyRequest with empty parameters
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Co-authored-by: Mattt Zmuda <mattt@loopwork.com>
* Allow `params` field to be omitted in requests for methods with empty parameters
* Add ping request to roundtrip test
* Generalize decoding of non-required parameters
