It seems like these were already wrong?
- `Symbols` -> `Symbol`
- `Use` errors unless `width` and `height` are string?
- `Svg` errors if `width` and `height` are not provided?
Also:
- Extracts and exports the string enum types
- Adds or renames prop types such that every `Foo`
component export also has a `FooProps`
- Adds non-default export of `Svg`, so `import * as Svg ...`
is usable.
- Makes `RadialGradientProps.gradientUnits` optional, like
for `LinearGradientProps.gradientUnits`.
- Adds stronger type for `TransformProps.transform` based
on code in `extractTranform.js` (please double-check!)
- Fixes typo in `DefinationProps` name.
- A handful of minor formatting normalizations.
