Fix missing FUNCTION in Better String Node

While it works in some cases, other cases need this little stubby thing here.

This will stop errors when feeding into nodes such as Save Image.

__init__.py

@@ -7,17 +7,18 @@ class BetterString:
     def INPUT_TYPES(s):
         return {
             "required": {
-                "string_field": ("STRING", {
-                    "multiline": True,
-                    "default": ""
-                }),
+                "string": ("STRING", {"multiline": True}),
             },
         }
 
+    FUNCTION = "event"
     RETURN_TYPES = ("STRING",)
 
     CATEGORY = "Better Things 💡"
 
+    def event(self, string):
+        return (string, )
+
 
 NODE_CLASS_MAPPINGS = {
     "BetterString": BetterString
@@ -25,4 +26,4 @@ NODE_CLASS_MAPPINGS = {
 
 NODE_DISPLAY_NAME_MAPPINGS = {
     "BetterString": "Better String"
-}
+}