Upgrade Hunter to 0.23.211 to enable use of Visual Studio 2017

[halfalicious]

Fix #5516

Upgrade Hunter to get YAML-CPP fix which enables use of Visual Studio
2017 to build Aleth. Notable package updates are:

• YAML-CPP (0.6.2-p0 -> 0.6.2-p1)
• ethash (0.4.4 -> 0.5.0)

[codecov-io]

Codecov Report

Merging #5719 into master will decrease coverage by 0.01%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #5719      +/-   ##
==========================================
- Coverage   63.11%   63.09%   -0.02%     
==========================================
  Files         353      353              
  Lines       30193    30193              
  Branches     3386     3386              
==========================================
- Hits        19056    19051       -5     
- Misses       9901     9906       +5     
  Partials     1236     1236

[chfast]

Great. What was blocking VS 2017 before?

[halfalicious]

Great. What was blocking VS 2017 before?

@chfast Good question 😀 From #5516 (comment):

I believe this will be fixed by upgrading Hunter to the latest version (v0.23.211) (archive link) - the reason that the dependencies fail to build when generating the VS 2017 solution is because YAML-CPP has a workaround for VS's lack of noexcept which uses a token that's no longer present on VS2017 >= 15.8 (_NOEXCEPT). This was fixed in YAML-CPP release 0.6.2-p1 (fix commit), but the version of Hunter that Aleth currently uses (0.23.178) only has YAML-CPP version 0.6.2-p0.