Remove too strict check

src/check.ts

@@ -7,7 +7,7 @@ for (const feed of fs
   try {
     const xml: any = xmlbuilder2.convert(
       fs.readFileSync(`static/feeds/${feed}`, "utf8"),
-      { format: "object", wellFormed: true }
+      { format: "object" }
     );
     if (xml?.feed?.updated === undefined)
       throw new Error("Can’t find xml.feed.updated");

src/index.tsx

@@ -298,7 +298,6 @@ function renderHTML(component: React.ReactElement): string {
 function renderXML(xml: object): string {
   return xmlbuilder2.convert({ invalidCharReplacement: "" }, xml, {
     format: "xml",
-    wellFormed: true,
     noDoubleEncoding: true,
     prettyPrint: true
   });
@@ -307,7 +306,6 @@ function renderXML(xml: object): string {
 function parseXML(xml: string): any {
   return xmlbuilder2.convert({ invalidCharReplacement: "" }, xml, {
     format: "object",
-    wellFormed: true,
     noDoubleEncoding: true
   });
 }