[debian] add missing dependencies

debian/control

@@ -17,10 +17,12 @@ Vcs-Browser: http://hg.logilab.org/master/logilab/mtconverter
 Package: python-logilab-mtconverter
 Architecture: all
 Depends:
- ${python:Depends},
- ${misc:Depends},
  python-six,
  python-logilab-common,
+ python-lxml,
+ python-html2text,
+ ${python:Depends},
+ ${misc:Depends},
 Suggests: python-imaging, python-pygments, pdftotext, lynx, python-chardet
 Description: library to convert from a MIME type to another
  This package was originally a backport of Zope's PortalTransforms tool with
@@ -31,6 +33,8 @@ Architecture: all
 Depends:
  python3-six,
  python3-logilab-common,
+ python3-lxml,
+ python3-html2text,
  ${python3:Depends},
  ${misc:Depends},
 Suggests: python3-pil, python3-pygments, poppler-utils, lynx, python3-chardet