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, 35 insertions, 32 deletions

diff --git a/src/compiler/parse/read/expression.ts b/src/compiler/parse/read/expression.ts
index 3af2868e6..56e79265d 100644
--- a/src/compiler/parse/read/expression.ts
+++ b/src/compiler/parse/read/expression.ts
@@ -6,36 +6,39 @@ import { whitespace } from '../../utils/patterns.js';
 // import { Node } from 'estree';
 
 export default function read_expression(parser: Parser): string {
-	try {
-		const node = parse_expression_at(parser.template, parser.index);
-
-		let num_parens = 0;
-
-		for (let i = parser.index; i < node.start; i += 1) {
-			if (parser.template[i] === '(') num_parens += 1;
-		}
-
-		let index = node.end;
-		while (num_parens > 0) {
-			const char = parser.template[index];
-
-			if (char === ')') {
-				num_parens -= 1;
-			} else if (!whitespace.test(char)) {
-				parser.error({
-					code: 'unexpected-token',
-					message: 'Expected )'
-				}, index);
-			}
-
-			index += 1;
-		}
-
-		parser.index = index;
-		
-		return parser.template.substring(node.start, node.end);
-		// return node as Node;
-	} catch (err) {
-		parser.acorn_error(err);
-	}
+  try {
+    const node = parse_expression_at(parser.template, parser.index);
+
+    let num_parens = 0;
+
+    for (let i = parser.index; i < node.start; i += 1) {
+      if (parser.template[i] === '(') num_parens += 1;
+    }
+
+    let index = node.end;
+    while (num_parens > 0) {
+      const char = parser.template[index];
+
+      if (char === ')') {
+        num_parens -= 1;
+      } else if (!whitespace.test(char)) {
+        parser.error(
+          {
+            code: 'unexpected-token',
+            message: 'Expected )',
+          },
+          index
+        );
+      }
+
+      index += 1;
+    }
+
+    parser.index = index;
+
+    return parser.template.substring(node.start, node.end);
+    // return node as Node;
+  } catch (err) {
+    parser.acorn_error(err);
+  }
 }