Replace xml.etree with defusedxml
    
    to fix the issue of:
    
    Using xml.etree.ElementTree.parse to parse untrusted XML data is known
    to be vulnerable to XML attacks. Replace xml.etree.ElementTree.parse with
    its defusedxml equivalent function or make sure defusedxml.defuse_stdlib()
    is called.
    
    FIXES: #62