theme-ui/components optional dependency

[jbolda]

The new components in theme-ui have gatsby listed as an optional dep. When you install to a non-gatsby site (say Create React App), we get issues with multiple versions of webpack as gatsby is also being installed.

The react-scripts package provided by Create React App requires a dependency:

  "webpack": "4.41.0"

Don't try to install it manually: your package manager does it automatically.
However, a different version of webpack was detected higher up in the tree:

  C:\Users\Jacob\Documents\dev\finatr\node_modules\webpack (version: 4.41.2)

$ npm ls webpack
[email protected] C:\Users\Jacob\Documents\dev\finatr
+-- @theme-ui/[email protected]
| `-- [email protected]
|   `-- [email protected] 
`-- [email protected]
  `-- [email protected]