Fix some linter warnings and deprecations

[brainexe]

No description provided.

[codecov-commenter]

Codecov Report

Merging #464 (aab9e7a) into master (13ac2b2) will increase coverage by 0.06%.
The diff coverage is 81.25%.

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@@            Coverage Diff             @@
##           master     #464      +/-   ##
==========================================
+ Coverage   82.10%   82.16%   +0.06%     
==========================================
  Files         128      128              
  Lines        5850     5855       +5     
==========================================
+ Hits         4803     4811       +8     
+ Misses        925      922       -3     
  Partials      122      122              

Files Changed	Coverage Δ
command/clouds/aws/ecs.go	6.19% <0.00%> (-0.06%)	⬇️
command/random.go	100.00% <ø> (ø)
bot/storage/file.go	100.00% <100.00%> (ø)
command/games/quiz.go	83.62% <100.00%> (+1.05%)	⬆️
command/pool/commands.go	100.00% <100.00%> (ø)
command/pool/pool.go	57.52% <100.00%> (+2.34%)	⬆️
command/pool/pool_commands.go	55.55% <100.00%> (ø)

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