Fix missing literal transformer and busted cmd command

[devth]

No description provided.

[codecov]

Codecov Report

Merging #108 into master will increase coverage by 0.09%.
The diff coverage is 66.66%.

@@            Coverage Diff             @@
##           master     #108      +/-   ##
==========================================
+ Coverage   43.78%   43.88%   +0.09%     
==========================================
  Files          90       90              
  Lines        3570     3571       +1     
  Branches      165      166       +1     
==========================================
+ Hits         1563     1567       +4     
+ Misses       1842     1838       -4     
- Partials      165      166       +1

Impacted Files	Coverage Δ
src/yetibot/core/interpreter.clj	65.75% <0%> (-0.92%)	⬇️
src/yetibot/core/commands/cmd.clj	88.88% <100%> (+38.88%)	⬆️
src/yetibot/core/parser.clj	91.42% <100%> (+0.25%)	⬆️

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