migrate instances of handleMjmlProps to convertPropsToMjmlAttributes function replacement
Update import location of MjmlRaw in tests
delete render-to-json test spec
these tests relied on mjml2json, which is out of date for the current version of mjml and desirable to remove from deps
these functions are not core exports
skip failing tests
Some tests are failing because we removed the color package dependency which previously performed some manipulation on colors. I don't think we want to support this in the future
Some test are failing because we no longer have an mj-selector or mj-html-attributes value. We may want to support these in the future
Addresses #21
handleMjmlPropstoconvertPropsToMjmlAttributesfunction replacementMjmlRawin tests