Fix return type of ammoOnPylon command

[kymckay]

This command can additionally return a boolean in the case of failure, so it should be considered to return type Anything.

Closes #31

[coveralls]

Coverage remained the same at 98.658% when pulling 1029c03 on SilentSpike:fix-ammoOnPylon into 6c2d612 on LordGolias:master.

[dedmen]

Not entirely correct though
https://github.com/intercept/intercept/blob/master/src/client/headers/client/sqf_assignments.hpp#L1260
It returns Number according to engine command definition.
And bool too according to biki https://community.bistudio.com/wiki/ammoOnPylon
Number and Bool is not Anything though

#31 (comment)

I see. But still that is kind of a defect. There are more commands that return multiple types but not Anything.

[kymckay]

For the purposes of the analyser here any command with multiple return types is considered to return Anything (at least for the time being)

[jonpas]

Merge?