No longer rely on pkg_resources

Signed-off-by: Katharina Dröge <kate@commandmc.de>

whipper/common/program.py

@@ -27,6 +27,8 @@ import shutil
 import time
 
 from tempfile import NamedTemporaryFile
+from packaging.version import Version
+
 from whipper.common import accurip, checksum, common, mbngs, path
 from whipper.program import cdrdao, cdparanoia
 from whipper.result import result
@@ -99,9 +101,8 @@ class Program:
 
         Also warn about buggy cdrdao versions.
         """
-        from pkg_resources import parse_version as V
         version = cdrdao.version()
-        if V(version) < V('1.2.3rc2'):
+        if Version(version) < Version('1.2.3rc2'):
             logger.warning('cdrdao older than 1.2.3 has a pre-gap length bug.'
                            ' See http://sourceforge.net/tracker/?func=detail&aid=604751&group_id=2171&atid=102171')  # noqa: E501