Patch Lit server shim to fix sass compatability (#3511)

* fix(#2623, #3508): patch lit server shim to allow sass compat

* chore: add changeset

.changeset/famous-pens-cheer.md

@@ -0,0 +1,5 @@
+---
+'@astrojs/lit': patch
+---
+
+Patch Lit's server shim to allow for `sass` compatability

packages/integrations/lit/package.json

@@ -37,7 +37,8 @@
   "devDependencies": {
     "astro": "workspace:*",
     "astro-scripts": "workspace:*",
-    "cheerio": "^1.0.0-rc.11"
+    "cheerio": "^1.0.0-rc.11",
+    "sass": "^1.52.1"
   },
   "peerDependencies": {
     "@webcomponents/template-shadowroot": "^0.1.0",

packages/integrations/lit/server-shim.js

@@ -3,3 +3,5 @@ installWindowOnGlobal();
 
 window.global = window;
 document.getElementsByTagName = () => [];
+// See https://github.com/lit/lit/issues/2393
+document.currentScript = null;

packages/integrations/lit/test/sass.test.js

@@ -0,0 +1,14 @@
+import { expect } from 'chai';
+
+describe('check', () => {
+	it('should be able to load sass', async () => {
+		let error = null;
+		try {
+			await import(new URL('../server-shim.js', import.meta.url));
+			await import('sass');
+		} catch (e) {
+			error = e;
+		}
+		expect(error).to.be.null;
+	});
+});