Parsing memory fixes

[VisenDev]

Closes #62

[VisenDev]

@natecraddock After thinking about this some more, an alternative way of managing this memory could be to have a specific toAnyScalar that just returns basic types and thus has no need for memory allocation, and having a toAny that can allocate memory for slices that returns a ziglua.Parsed(T)

Alternative names could be toAny and toAnyAlloc. toAny will warn you if you give a type that needs memory allocation to parse at compile time, in which case you can use toAnyAlloc

[VisenDev]

Actually thinking about it more I think I like using a toAny and a toAnyAlloc instead of my current approach. It seems to make a lot more sense and follows zig's library memory allocator passing convention better. I am going to rework some things

[VisenDev]

I think the checks are failing because of some sort of network error, it doesn't seem to be related to the code

[natecraddock]

I'm going to go ahead and merge this as-is. There are some small things I might want to tweak later, but that polish can come before the 0.3.0 release of ziglua (that I want to make shortly after Zig 0.12.0)