feat: lit support

Author: yaegassy

package.json

@@ -19,6 +19,7 @@
     "angular",
     "react",
     "vue",
+    "lit",
     "multi-root ready"
   ],
   "engines": {

src/completion.ts

@@ -140,12 +140,12 @@ export class SelectorCompletionItemProvider implements CompletionItemProvider, D
   findEmbedded(uri: Uri, keys: Set<string>, text: string) {
     const key = uri.toString();
     const items: CompletionItem[] = [];
-    const findStyles = /<style[^>]*>([^<]+)<\/style>/gi;
+    const findStyles = /(?:<style[^>]*>([^<]+)<\/style>|css\s*`([^`]+)`)/gi;
 
     let style: string[] | null;
 
     while ((style = findStyles.exec(text)) !== null) {
-      this.parseTextToItems(basename(uri.fsPath), style[1], items);
+      this.parseTextToItems(basename(uri.fsPath), style[1] || style[2], items);
     }
 
     this.cache.set(key, items);