Support node 12

hueniverse · hueniverse · commit 013af552f30f · 2021-12-01T21:35:30.000-08:00
diff --git a/lib/types/string.js b/lib/types/string.js
@@ -131,7 +131,9 @@ module.exports = Any.extend({
 
         if (value === '') {
             const min = schema.$_getRule('min');
-            if (min?.args.limit === 0) {
+            if (min &&
+                min.args.limit === 0) {
+
                 return;
             }
 
