moved MemoryExtensions from 'System' to 'Spanextensions' and bumped version.

Author: dragon7307

src/Enumerators/System/SpanSplitEnumerator.cs

@@ -1,10 +1,11 @@
-using System.Buffers;
+using System;
+using System.Buffers;
 using System.Diagnostics;
 using System.Runtime.CompilerServices;
 
 #if !NET9_0_OR_GREATER
 
-namespace System
+namespace SpanExtensions
 {
 #pragma warning disable CS1591 // Missing XML comment for publicly visible type or member
     public static partial class MemoryExtensions
@@ -144,5 +145,4 @@ internal enum SpanSplitEnumeratorMode
         }
     }
 }
-
 #endif

src/SpanExtensions.csproj

@@ -22,7 +22,7 @@
 		<PackageTags>Span;Performance;Extension;String</PackageTags>
 		<PackageReleaseNotes>https://github.com/draconware-dev/SpanExtensions.Net/blob/main/Changelog.md</PackageReleaseNotes> 
 		<PackageLicenseFile>LICENSE</PackageLicenseFile>
-		<Version>1.5</Version>
+		<Version>1.5.1</Version>
 		<PackageId>SpanExtensions.Net</PackageId>
 		<PackageReadmeFile>README.md</PackageReadmeFile>
 		<PackageIcon>icon.png</PackageIcon>