Breaking changes: DefinitelyTyped/DefinitelyTyped#64451

• release: 3.1.0 #318
• Unflag all codemods Unflag codemods for new refs #319
• refs are mutable by default: refobject-defaults
• Require initial value for useRef: useref-required-initial (Add codemod for required initial value in useRef #217)
• Remove deprecated global JSX namespace: scoped-jsx
• [ ] Remove deprecated SFCFactory (createFactory has been removed so types are no longer needed)
• Remove deprecated ReactText
• Remove deprecated ReactChild
• Remove deprecated ReactNodeArray (low priority): deprecated-react-node-array (feat: Add deprecated-react-node-array transform #325)
• Remove deprecated ReactFragment (low priority): deprecated-react-fragment (feat: Add deprecated-react-fragment transform #326)
• Remove deprecated VFC: deprecated-void-function-component
• Remove deprecated VoidFunctionComponent: deprecated-void-function-component
• Remove deprecated types related to propTypes: deprecated-prop-types-types
• Remove deprecated ReactChildren (needs champion)
• Remove deprecated types related to mixins (needs champion)
• Remove deprecated ReactHTML and ReactSVG (needs champion)
• Remove deprecated types related to propTypes: deprecated-prop-types-types