Sketch crashing when running Styled Components Example
_I am..._

| -------------------------------------------------------------------------------------------------
| Reporting a bug or issue
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**Expected behavior:**

When running the Styled Components example, I'm getting errors which causes Sketch to crash. I would expect Sketch to open up the example generated from running "npm run render".

**Observed behavior:**
Currently crashes Sketch when running "npm run render" from the terminal for this specific example.

I'm getting these errors:
console> Warning: Failed prop type: Invalid prop `style` supplied to `View`.
    in View (created by Styled(View))
    in Styled(View) (created by Document)
    in Document
console> Warning: Failed prop type: Invalid prop `style` of type `array` supplied to `Text`, expected `object`.
    in Text (created by Styled(Text))
    in Styled(Text) (created by Document)
    in view (created by View)
    in View (created by Styled(View))
    in Styled(View) (created by Document)
    in Document
Unrecognized font family 'GT America'
Unrecognized font family 'Himalaya'
Unrecognized font family 'Himalaya'
Unrecognized font family 'GT America'
⚒  Built ./my-command.js in 6906ms

**How to reproduce:**
In terminal, navigate to the Styled Components directory, install npm, and enter "npm run render"

**Sketch version:**
48.2


[sketch_crash_notes.pdf](https://github.com/airbnb/react-sketchapp/files/1712451/sketch_crash_notes.pdf)