Specs do not pass on .31

[srcrip]

➜  cltk git:(master) ✗ crystal spec  
Showing last frame. Use --error-trace for full trace.

In spec/cltk/parser_spec.cr:272:5

 272 | @ops : Array(
       ^---
Error: instance variable '@ops' of RotatingCalc::Environment must be Array(Proc(Int32, Int32, Int32)), not (Array(Proc(Int32, Int32, Float64) | Proc(Int32, Int32, Int32)) | Array(Proc(Int32, Int32, Int32)))
➜  cltk git:(master) ✗ 

[anykeyh]

See #7. You can use my branch if needed.