minify error handling

wikizimmer.js

@@ -563,6 +563,7 @@ class Article extends ArticleStub {
 
     async preProcess( data ) {
         let src
+        let out
         try {
             src = cheerio.load( data )
         } catch ( e ) {
@@ -619,20 +620,25 @@ class Article extends ArticleStub {
 
             this.mimeType = 'text/html'
             this.encoding = 'utf-8'
-            const out = dom.html()
-            const minified = minify( out, {
+            out = dom.html()
+        } catch ( err ) {
+            log( err )
+            return data
+        }
+        try {
+            out = minify( out, {
                 collapseWhitespace: true,
                 conservativeCollapse: true,
                 decodeEntities: true,
                 sortAttributes: true,
                 sortClassName: true,
                 removeComments: true,
+                html5: false,
             })
-            return minified
         } catch ( err ) {
-            log( err )
-            return null
+            log( 'minify', err )
         }
+        return out
     }
 
     transformLink( elem ) {