From c45bf9b5bf4bfb7f66a78a2dd2883e1701f7abd2 Mon Sep 17 00:00:00 2001
From: Joby Elliott <joby@Jobys-iMac.local>
Date: Mon, 27 Aug 2018 14:15:28 -0600
Subject: [PATCH] key normalization was needlessly restrictive

---
 src/FlatArrayTrait.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/FlatArrayTrait.php b/src/FlatArrayTrait.php
index 6b534c2..923dd10 100644
--- a/src/FlatArrayTrait.php
+++ b/src/FlatArrayTrait.php
@@ -204,7 +204,7 @@ trait FlatArrayTrait
         }
         $norm = [];
         foreach ($value as $key => $value) {
-            $nKey = preg_replace('/[^a-z0-9\-\_]/', '', strtolower($key));
+            $nKey = preg_replace('/\./', '', strtolower($key));
             if ($nKey == '') {
                 throw new \Exception("Key \"$key\" can't be used inside a FlatArray");
             }