message: Remove contextTypes from Field
diff: -import * as PropTypes from 'prop-types'
  import * as React from 'react'
  import { Field as FinalFormField, FieldProps as FinalFieldProps, FieldRenderProps as FinalRenderProps, ReactContext as ReactFinalFormContext, withReactFinalForm } from 'react-final-form'
  @@ -24,10 +23,6 @@ export interface FieldProps extends FieldWrapperProps, FinalFieldProps, ReactFin
  export class FieldCmp extends React.Component<FieldProps> {
  - static contextTypes = {
  - reactFinalForm: PropTypes.object,
  - }
  -
  static defaultProps: Partial<FieldProps> = {
  hasWrapper: true,
  }
  