Replace deprecated Logger.warn with Logger.warning

Author: Harmon758

git/objects/submodule/base.py

@@ -538,7 +538,7 @@ def update(self, recursive=False, init=True, to_latest_revision=False, progress=
                         mrepo.head.set_reference(local_branch, logmsg="submodule: attaching head to %s" % local_branch)
                         mrepo.head.ref.set_tracking_branch(remote_branch)
                     except (IndexError, InvalidGitRepositoryError):
-                        log.warn("Failed to checkout tracking branch %s", self.branch_path)
+                        log.warning("Failed to checkout tracking branch %s", self.branch_path)
                     # END handle tracking branch
 
                     # NOTE: Have to write the repo config file as well, otherwise

git/objects/submodule/root.py

@@ -265,7 +265,7 @@ def update(self, previous_commit=None, recursive=True, force_remove=False, init=
                                     # this way, it will be checked out in the next step
                                     # This will change the submodule relative to us, so
                                     # the user will be able to commit the change easily
-                                    log.warn("Current sha %s was not contained in the tracking\
+                                    log.warning("Current sha %s was not contained in the tracking\
              branch at the new remote, setting it the the remote's tracking branch", sm.hexsha)
                                     sm.binsha = rref.commit.binsha
                                 # END reset binsha