Update a bunch of low-risk stuff at once

[smashwilson]

Fixes #2020.
Fixes #2029.
Fixes #2034.
Fixes #2035.
Fixes #2031.
Fixes #2033.

[codecov]

Codecov Report

Merging #2050 into master will increase coverage by 0.35%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #2050      +/-   ##
==========================================
+ Coverage   92.18%   92.54%   +0.35%     
==========================================
  Files         207      207              
  Lines       12010    12010              
  Branches     1745     1745              
==========================================
+ Hits        11072    11115      +43     
+ Misses        938      895      -43

Impacted Files	Coverage Δ
lib/git-shell-out-strategy.js	100% <0%> (+0.19%)	⬆️
lib/helpers.js	89.95% <0%> (+4.36%)	⬆️
lib/models/file-system-change-observer.js	96% <0%> (+8%)	⬆️
lib/git-temp-dir.js	100% <0%> (+9.09%)	⬆️
lib/shared/keytar-strategy.js	58.13% <0%> (+19.37%)	⬆️

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