Correct version for recent bzrlib fix.

Correct version for recent bzrlib fix.

Rather than guessing from the output of `bzr tags`, I actually looked
in the realease notes and tracked the removal of run_direct() to
2.2b2, which is confirmed by the r5146 patch itself:

bzr.dev $ ./bzr log -p -n 0 -r 5146 | grep -1 deprec
+
+    @deprecated_method(deprecated_in((2, 2, 0)))
     def run_direct(self, *args, **kwargs):
--
    +
    +    @deprecated_method(deprecated_in((2, 2, 0)))
         def run_direct(self, *args, **kwargs):