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, 2 insertions, 2 deletions

diff --git a/src/compiler/utils/link.ts b/src/compiler/utils/link.ts
index 7cdef75d9..0dc5af1b7 100644
--- a/src/compiler/utils/link.ts
+++ b/src/compiler/utils/link.ts
@@ -1,4 +1,4 @@
 export function link<T extends { next?: T; prev?: T }>(next: T, prev: T) {
-	prev.next = next;
-	if (next) next.prev = prev;
+  prev.next = next;
+  if (next) next.prev = prev;
 }