Update versions of installation prerequisites

[hackdna]

No description provided.

[codecov]

Codecov Report

Merging #3069 into develop will decrease coverage by 0.06%.
The diff coverage is n/a.

@@             Coverage Diff             @@
##           develop    #3069      +/-   ##
===========================================
- Coverage    60.45%   60.38%   -0.07%     
===========================================
  Files          434      434              
  Lines        27532    27460      -72     
  Branches      1292     1276      -16     
===========================================
- Hits         16644    16582      -62     
+ Misses       10888    10878      -10

Impacted Files	Coverage Δ
...nery/ui/source/js/file-browser/services/factory.js	64.12% <0%> (-7.8%)	⬇️

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[scottx611x]

Should we specify git 2.19.0 if we're targeting the latest current releases here?

[hackdna]

2.17.1 is the version of git that comes with OS X 10.13.6 and the one I have tested with. If you can confirm that v2.19.0 works then I can update the PR.

[scottx611x]

@hackdna I've been using git v2.19.0 for the past 5 days and haven't had any issues