Fix unnecessary rendering of FastField (#2070)
Fix unnecessary rendering of FastField (#2070)

* Fix unnecessary rendering of FastField

Whenever Context changes, shouldComponentUpdate is not called, which caused FastField to always re-render whenever Context changes
This adds a wrapper around FastField that grabs the Context, and passes it down as props

* Use connect() to wrap FastField

jaredpalmer/formik,jaredpalmer/formik,jaredpalmer/formik