Initial tests set up (#10)

* Begin debugging

* Initial tests set up

This adds tests using uvu (we can switch if people want) and restructures things a bit so that it's easier to test.

Like in snowpack you set up a little project. In our tests you can say:

```js
const result = await runtime.load('/blog/hello-world')
```

And analyze the result. I included a `test-helpers.js` which has a function that will turn HTML into a cheerio instance, for inspecting the result HTML.

* Add CI

* Remove extra console logs

* Formatting

1 files changed, 5 insertions, 0 deletions

diff --git a/test/test-utils.js b/test/test-utils.js
new file mode 100644
index 000000000..80241d6f5
--- /dev/null
+++ b/test/test-utils.js
@@ -0,0 +1,5 @@
+import cheerio from 'cheerio';
+
+export function doc(html) {
+  return cheerio.load(html);
+}
\ No newline at end of file