lang: funcs: Module name should be public

For consistency with the rest of the core functions.

lang/funcs/core/deploy/readfile_func.go

@@ -28,7 +28,7 @@ import (
 )
 
 func init() {
-	funcs.ModuleRegister(moduleName, "readfile", func() interfaces.Func { return &ReadFileFunc{} }) // must register the func and name
+	funcs.ModuleRegister(ModuleName, "readfile", func() interfaces.Func { return &ReadFileFunc{} }) // must register the func and name
 }
 
 // ReadFileFunc is a function that reads the full contents from a file in our