Lua implementation issue (please rename)

@zef I’ve just found another issue with Lua implementation:

```space-lua
function toCamelCase(text)
  return string.gsub(text, '(_)([a-z])', function(_, l) return l:upper() end)
end
```
${toCamelCase('snake_case')}

Actual output:

[object Object]

Expected output:

snakeCase

Again, it works in Lua in commadline. It looks like some fundamental flaw somewhere. Should I create GH issue for it?

Maybe related here and also here.

Could you report all of these as Github issues instead?