Issue #48: Bugs with Mentions and with Queue Length History from Regex Update

[amthorn]

This PR Fixes a bug raised in issue #48 where the recent regex update broke some command parsers. This PR also adds several pieces of missing parse coverage to ensure this won't happen again.

Resolves #48

[codecov-commenter]

Codecov Report

Merging #49 (69dc81a) into master (1cfdbab) will not change coverage.
The diff coverage is 100.00%.

@@            Coverage Diff            @@
##            master       #49   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files           43        43           
  Lines          915       920    +5     
  Branches       122       123    +1     
=========================================
+ Hits           915       920    +5     

Impacted Files	Coverage Δ
services/bot/src/commands/admins/create.ts	100.00% <100.00%> (ø)
services/bot/src/commands/admins/remove.ts	100.00% <100.00%> (ø)
...ices/bot/src/commands/graphs/queueLengthHistory.ts	100.00% <100.00%> (ø)
services/bot/src/commands/queue/addPerson.ts	100.00% <100.00%> (ø)
services/bot/src/commands/queue/get.ts	100.00% <100.00%> (ø)
services/bot/src/commands/queue/removePerson.ts	100.00% <100.00%> (ø)
services/bot/src/parser.ts	100.00% <100.00%> (ø)

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