Auto merge of #392 - joelwurtz:patch-1, r=jdm

Add property to local_names

`property` can exist as an attribute name in `meta` tags like `<meta property="og:title" content="Title" />`

Author: bors-servo

markup5ever/local_names.txt

@@ -736,6 +736,7 @@ product
 profile
 progress
 prompt
+property
 prsubset
 q
 quotient