Change parseHtml to only have a single return statement, a single call

to proxyNode.

@@ -386,11 +386,12 @@ const proxyNode = (node, options, parent) => {
 }
 
 export const parseHtml = (html: string, options): NodeType => {
-  const cached = parsedHtmlCache.get(html)
-  if (cached) return proxyNode(cached, options)
-  const doc = ultraParse(html)
-  parsedHtmlCache.set(html, doc)
-  return proxyNode(doc, options)
+  let cached = parsedHtmlCache.get(html)
+  if (!cached) {
+    cached = ultraParse(html)
+    parsedHtmlCache.set(html, cached)
+  }
+  return proxyNode(cached, options)
 }
 
 export const findNode = (doc: NodeType, selector: string): NodeType => {