Parse rejected deletes.

[uri-canva]

Successful branch deletions look like

-	:refs/heads/test-delete	[deleted]

however rejected branch deletions look like

!	(delete):refs/heads/test-delete	[rejected] (stale info)

for some reason. Parse those as well.

[codecov-io]

Codecov Report

Merging #929 into master will decrease coverage by 0.14%.
The diff coverage is 100%.

@@ Coverage Diff @@## master #929 +/- ##
==========================================
- Coverage 93.61% 93.47% -0.15% 
==========================================
Files 59 59 Lines 9794 9582 -212 ==========================================
- Hits 9169 8957 -212 
Misses 625 625

Impacted Files	Coverage Δ
git/test/test_remote.py	97.84% <100%> (ø)	⬆️
git/objects/tree.py	59.06% <0%> (-0.94%)	⬇️
git/index/util.py	90.69% <0%> (-0.61%)	⬇️
git/refs/log.py	93.07% <0%> (-0.59%)	⬇️
git/index/typ.py	96.82% <0%> (-0.58%)	⬇️
git/test/lib/helper.py	85.46% <0%> (-0.49%)	⬇️
git/test/test_util.py	90.34% <0%> (-0.33%)	⬇️
git/objects/base.py	95.83% <0%> (-0.33%)	⬇️
git/refs/tag.py	96.66% <0%> (-0.31%)	⬇️
git/refs/reference.py	95.74% <0%> (-0.26%)	⬇️
... and 27 more

---

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[Byron]

Fantastic! Thanks so much!