setImmediate deprecated

[Atchett]

Hi,

I'm running into an issue using the plugin.

The problem is that when trying to configure with a module (using cms.js rather than config.yml), locally, I get a blank screen and an error in the console -

Uncaught ReferenceError: setImmediate is not defined at ./node_modules/gatsby-plugin-static-cms/cms-identity.js

I've googled a bit and taken a look at the code and I'm not 100% what this is doing, but I noticed that the method is deprecated, according to mozilla - https://developer.mozilla.org/en-US/docs/Web/API/Window/setImmediate

Any ideas what the fix might be for this?

Thanks,