fix build

Author: thecodingwizard

jest-preprocess.js

@@ -2,4 +2,4 @@ const babelOptions = {
   presets: ['babel-preset-gatsby', '@babel/preset-typescript'],
 };
 
-module.exports = require('babel-jest').createTransformer(babelOptions);
+module.exports = require('babel-jest').default.createTransformer(babelOptions);