basic-setup-typescript compile error: No overload matches this definition error:  Style typings suspected
_I am setting up react-sketchapp using the basic-setup-typescript example.
The example application is not compiling due to an type error related to styling.
It looks like Text and View components with the `fontweight` css rule in style definition results in a typescript error: `No overload matches this definition error`_

**Expected behavior:**

Application compiles and swatches are built in sketch.

**Observed behavior:**

I'm setting up react-sketchapp using the [basic-setup-typescript][1] example.
The example application is not compiling due to an type error related to styling.
It looks like Text and View components with the `fontweight` css rule in style definition results in a typescript error: `No overload matches this definition error`

Considering this code snippet from [my-command.tsx][2] 
```
const Swatch = ({ name, hex }: SwatchProps) => (
  <View
    name={`Swatch ${name}`}
    style={{
      height: 96,
      width: 96,
      margin: 4,
      backgroundColor: hex,
      padding: 8,
    }}
  >
    <Text name="Swatch Name" style={{ color: textColor(hex), fontWeight: 'bold' }}>
      {name}
    </Text>
    <Text name="Swatch Hex" style={{ color: textColor(hex) }}>
      {hex}
    </Text>
  </View>
);
```
You can see that the style definition for the `View` component has multiple rules while the `Text` component has only two.  This example results in  the error above `error TS2769: No overload matches this call.`

Removing `fontWeight` from the `Text` component allows the code to compile and render the example.

    <Text name="Swatch Name" style={{ color: textColor(hex) }}>
      {name}
    </Text>


Moving `fontWeight` to the `View` component results in the typescript error again.

```
  <View
    name={`Swatch ${name}`}
    style={{
      height: 96,
      width: 96,
      margin: 4,
      backgroundColor: hex,
      padding: 8,
      fontWeight: 'bold' <--- added
    }}
  >
```

It looks like there is a problem with the type definitions, but I'm having difficulty tracking it down.  I did find a types file (`src/types`) in which `TextStyle` extends `ViewStyle` type definition and does include fontWeight as optional:

```
export type TextStyle = ViewStyle & {
  ...
  fontWeight?: string;
  ...
```

**How to reproduce:**

`cd` to `/examples/basic-setup-typescript basic-example-typescript` and run the render script with `npm run render`

**Sketch version:**
64

**Please attach screenshots, a zip file of your project, and/or a link to your github project**
https://github.com/airbnb/react-sketchapp/tree/master/examples/basic-setup-typescript