add SignIn question

[ghost]

Fixes #35

[codecov]

Codecov Report

Merging #36 into master will increase coverage by <.01%.
The diff coverage is 95.23%.

@@            Coverage Diff             @@
##           master      #36      +/-   ##
==========================================
+ Coverage   94.95%   94.95%   +<.01%     
==========================================
  Files          35       36       +1     
  Lines        1208     1228      +20     
==========================================
+ Hits         1147     1166      +19     
- Misses         61       62       +1

Impacted Files	Coverage Δ
src/Action/Conversation.php	100% <100%> (ø)	⬆️
src/Action/Questions/SignIn.php	100% <100%> (ø)
src/Action/Arguments.php	76.92% <75%> (-0.22%)	⬇️

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