Aaron, I added the code you suggested as you can see here:
but when running the code with: $ npm start
the following is what is get rendered:

did you get the component rendered properly?
I removed the node_modules
directory and installed them again with no success.
could you maybe try my repository?
as you can see, I have done just 2 commits on top of the official commits:
Just in case here are the versions I’m using for the primary tools:
$ node -v
v8.11.2
$ npm -v
6.1.0
$ ionic -v
ionic CLI 4.1.1