Update README.md

README.md

@@ -6,29 +6,29 @@
 - [Installation](#installation)
 - [Features](#features)
 - [Examples](#examples)
- - [Collections](#collections)
-  - [Collection](#collection)
-  - [TypedCollection](#typedcollection)
-  - [UniquedCollection](#uniquedcollection)
-  - [UniquedTypedCollection](#uniquedtypedcollection)
- - [DataType](#datatype)
-  - [Enum](#enum)
-  - [SimpleValueObject](#simplevalueobject)
- - [ArrayUtils](#arrayutils)
-  - [Flatten](#flatten)
-  - [ToXmlString and ToXml](#toxmlstring-and-toxml)
- - [ObjectUtils](#objectutils)
-  - [ToArray](#toarray)
-  - [ToXmlString and ToXml](#toxmlstring-and-toxml)
- - [StringUtils](#stringutils)
-  - [BeginsWith](#beginswith)
-  - [EndsWith](#endswith)
-  - [RemoveAccents](#removeaccents)
-  - [RemoveExtraSpaces](#removeextraspaces)
-  - [IsUrl and IsEmail](#isurl-and-isemail)
- - [FileUtils](#fileutils)
-  - [ExtensionIs](#extensionis)
-  - [ScanDir](#ScanDir)
+    - [Collections](#collections)
+        - [Collection](#collection)
+        - [TypedCollection](#typedcollection)
+        - [UniquedCollection](#uniquedcollection)
+        - [UniquedTypedCollection](#uniquedtypedcollection)
+    - [DataType](#datatype)
+        - [Enum](#enum)
+        - [SimpleValueObject](#simplevalueobject)
+    - [ArrayUtils](#arrayutils)
+        - [Flatten](#flatten)
+        - [ToXmlString and ToXml](#toxmlstring-and-toxml)
+    - [ObjectUtils](#objectutils)
+        - [ToArray](#toarray)
+        - [ToXmlString and ToXml](#toxmlstring-and-toxml)
+    - [StringUtils](#stringutils)
+        - [BeginsWith](#beginswith)
+        - [EndsWith](#endswith)
+        - [RemoveAccents](#removeaccents)
+        - [RemoveExtraSpaces](#removeextraspaces)
+        - [IsUrl and IsEmail](#isurl-and-isemail)
+    - [FileUtils](#fileutils)
+        - [ExtensionIs](#extensionis)
+        - [ScanDir](#ScanDir)
 - [Quality](#quality)
 - [Contribute](#contribute)
 - [Authors](#authors)