murmurhash is not a function

[timmysmalls]

When I try to install gatsby-source-wagtail, even on a fresh Gatsby installation, it throws an exception: murmurhash is not a function. It seems this is not the only gatsby source plugin that's dealing with this problem: birkir/gatsby-source-prismic-graphql#203.

Steps to reproduce:

1. Create a fresh Gatsby install. Just using the Gatsby default starter should do the trick.
2. Install gatsby-source-wagtail. (I used Yarn for this).
3. Try to run your server.

[timmysmalls]

So I think I fixed it. My server is running again. I'll create a PR and you can take a look at it :). It's the same fix applied hiere: birkir/gatsby-source-graphql-universal#16.

[tbrlpld]

This issue is already fixed on "master". See my comment on #14. The issues can be closed