lang: funcs: core: Make module names public

This is needed for when we have nested modules.

lang/funcs/core/regexp/match_func.go

@@ -26,7 +26,7 @@ import (
 )
 
 func init() {
-	simple.ModuleRegister(moduleName, "match", &types.FuncValue{
+	simple.ModuleRegister(ModuleName, "match", &types.FuncValue{
 		T: types.NewType("func(pattern str, s str) bool"),
 		V: Match,
 	})

lang/funcs/core/regexp/regexp.go

@@ -18,6 +18,6 @@
 package coreregexp
 
 const (
-	// moduleName is the prefix given to all the functions in this module.
-	moduleName = "regexp"
+	// ModuleName is the prefix given to all the functions in this module.
+	ModuleName = "regexp"
 )