Support `import()` in Jest

[LinusBorg]

We should add babel-plugin-dynamic-import-node

[] - Add "dynamic-import-node" to babel plugins for the test environment.

webpack/template/.babelrc

Line 12 in b366b83

"plugins": ["istanbul"]

[] - Add the plugin to package.json as a dev dependency.

[LinusBorg]

closed in a37bcbb