Bump version to 2.5.7.

Author: grokys

Directory.Build.Props

@@ -1,8 +1,8 @@
 <Project>
   <PropertyGroup>
     <Product>GitHub Extension for Visual Studio</Product>
-    <Version>2.5.6.0</Version>
+    <Version>2.5.7.0</Version>
     <Copyright>Copyright © GitHub, Inc. 2014-2018</Copyright>
-	  <LangVersion>7.3</LangVersion>
+    <LangVersion>7.3</LangVersion>
   </PropertyGroup>
 </Project>

appveyor.yml

@@ -1,5 +1,5 @@
 os: Visual Studio 2017
-version: '2.5.6.{build}'
+version: '2.5.7.{build}'
 skip_tags: true
 install:
 - ps: |

src/GitHub.VisualStudio/source.extension.vsixmanifest

@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="utf-8"?>
 <PackageManifest Version="2.0.0" xmlns="http://schemas.microsoft.com/developer/vsx-schema/2011" xmlns:d="http://schemas.microsoft.com/developer/vsx-schema-design/2011">
   <Metadata>
-    <Identity Id="c3d3dc68-c977-411f-b3e8-03b0dccf7dfc" Version="2.5.6.0" Language="en-US" Publisher="GitHub, Inc" />
+    <Identity Id="c3d3dc68-c977-411f-b3e8-03b0dccf7dfc" Version="2.5.7.0" Language="en-US" Publisher="GitHub, Inc" />
     <DisplayName>GitHub Extension for Visual Studio</DisplayName>
     <Description xml:space="preserve">A Visual Studio Extension that brings the GitHub Flow into Visual Studio.</Description>
     <PackageId>GitHub.VisualStudio</PackageId>
@@ -42,4 +42,4 @@
   <Prerequisites>
     <Prerequisite Id="Microsoft.VisualStudio.Component.CoreEditor" Version="[15.0.25824.0,)" DisplayName="Visual Studio core editor" />
   </Prerequisites>
-</PackageManifest>
+</PackageManifest>

src/common/SolutionInfo.cs

@@ -18,6 +18,6 @@
 namespace System
 {
     internal static class AssemblyVersionInformation {
-        internal const string Version = "2.5.6.0";
+        internal const string Version = "2.5.7.0";
     }
 }