Exclude help from white black lists

[devth]

Fix #134

[codecov]

Codecov Report

Merging #135 into master will decrease coverage by 0.02%.
The diff coverage is 60.00%.

@@            Coverage Diff             @@
##           master     #135      +/-   ##
==========================================
- Coverage   42.72%   42.69%   -0.03%     
==========================================
  Files          92       92              
  Lines        3965     3972       +7     
  Branches      178      178              
==========================================
+ Hits         1694     1696       +2     
- Misses       2093     2098       +5     
  Partials      178      178              

Impacted Files	Coverage Δ
src/yetibot/core/commands/help.clj	30.00% <0.00%> (-7.50%)	⬇️
src/yetibot/core/hooks.clj	65.00% <75.00%> (-0.31%)	⬇️
src/yetibot/core/util/command.clj	72.34% <85.71%> (+1.88%)	⬆️
src/yetibot/core/commands/observe.clj	14.04% <0.00%> (-0.71%)	⬇️
src/yetibot/core/commands/collections.clj	26.82% <0.00%> (-0.23%)	⬇️
src/yetibot/core/commands/cron.clj	19.23% <0.00%> (ø)
src/yetibot/core/commands/history.clj	17.14% <0.00%> (ø)

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