[FIX] Update checker: LooseVersion doesn't handle str parts

E.g., '3.4.1' vs '3.4.dev' crashes on 'dev' with TypeError and
unorderable types.

Author: kernc

Orange/canvas/__main__.py

@@ -124,7 +124,6 @@ def check_for_updates():
         settings.setValue('startup/last-update-check-time', int(time.time()))
 
         from urllib.request import urlopen
-        from distutils.version import LooseVersion
         from Orange.version import version as current
 
         class GetLatestVersion(QThread):
@@ -138,7 +137,8 @@ def run(self):
                     log.exception('Failed to check for updates')
 
         def compare_versions(latest):
-            if LooseVersion(latest) <= LooseVersion(current):
+            version = pkg_resources.parse_version
+            if version(latest) <= version(current):
                 return
             question = QMessageBox(
                 QMessageBox.Information,