fix: escape xml attribute value when it has special html characters

[akki-io]

There are sometimes XML element that has values with quotes etc.

Example -

<meta-data name="icons" value="[{&quot;src&quot;:&quot;icon_512.png&quot;,&quot;sizes&quot;:&quot;512x512&quot;,&quot;type&quot;:&quot;image/png&quot;,&quot;purpose&quot;:&quot;any maskable&quot;}]">

The decompress() method inside the XmlParser class outputs this XML element with quotes which makes the XML invalid.

decompress() output

<meta-data name="icons" value="[{"src":"icons_512.png","sizes":"512x512","type":"image/png","purpose":"any maskable"}]">

This PR adds the feature to convert these special characters so that the XML is valid.

decompress() new output

<meta-data name="icons" value="[{&quot;src&quot;:&quot;icons_512.png&quot;,&quot;sizes&quot;:&quot;512x512&quot;,&quot;type&quot;:&quot;image/png&quot;,&quot;purpose&quot;:&quot;any maskable&quot;}]">

[tufanbarisyildirim]

Thanks @akki-io