fix: replace usage of unittest._TextTestResult by unittest.TextTestResult

logilab/common/testlib.py

@@ -706,7 +706,7 @@
         )
 
 
-class SkipAwareTestResult(unittest._TextTestResult):
+class SkipAwareTestResult(unittest.TextTestResult):
     def __init__(
         self,
         stream,
@@ -1024,7 +1024,7 @@
 
 
 # monkeypatch unittest and doctest (ouch !)
-unittest._TextTestResult = SkipAwareTestResult
+unittest.TextTestResult = SkipAwareTestResult
 unittest.TextTestRunner = SkipAwareTextTestRunner
 unittest.TestLoader = NonStrictTestLoader