BF: Added missing NullHandler to logger in git.remote

[bpoldrack]

Stumbled upon a No handlers could be found for logger "git.remote" message.
Apparently this issue has been addressed in PR #300 already. Back then git/remote.py wasn't included, so here is a one liner to do so.

[codecov-io]

Codecov Report

Merging #666 into master will increase coverage by 1.8%.
The diff coverage is n/a.

@@ Coverage Diff @@## master #666 +/- ## ========================================= + Coverage 92.57% 94.38% +1.8%  ========================================= Files 61 61 Lines 9968 9970 +2 ========================================= + Hits 9228 9410 +182 + Misses 740 560 -180

Impacted Files	Coverage Δ
git/test/test_remote.py	97.82% <0%> (ø)	⬆️
git/refs/remote.py	91.13% <0%> (+0.02%)	⬆️
git/compat.py	63.19% <0%> (+0.22%)	⬆️
git/refs/symbolic.py	96.5% <0%> (+0.31%)	⬆️
git/config.py	92.76% <0%> (+0.32%)	⬆️
git/test/test_submodule.py	99.22% <0%> (+0.38%)	⬆️
git/test/test_docs.py	100% <0%> (+0.39%)	⬆️
git/cmd.py	85.54% <0%> (+0.47%)	⬆️
git/repo/base.py	95.82% <0%> (+0.69%)	⬆️
git/exc.py	96.42% <0%> (+1.78%)	⬆️
... and 12 more

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