Added VS2017 support

OpenFileInSolution.csproj

@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="utf-8"?>
 <Project DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003" ToolsVersion="12.0">
   <PropertyGroup>
-    <MinimumVisualStudioVersion>14.0</MinimumVisualStudioVersion>
+    <MinimumVisualStudioVersion>15.0</MinimumVisualStudioVersion>
     <VisualStudioVersion Condition="'$(VisualStudioVersion)' == ''">12.0</VisualStudioVersion>
     <VSToolsPath Condition="'$(VSToolsPath)' == ''">$(MSBuildExtensionsPath32)\Microsoft\VisualStudio\v$(VisualStudioVersion)</VSToolsPath>
     <FileUpgradeFlags>

OpenFileInSolution.sln

@@ -1,7 +1,7 @@
 
 Microsoft Visual Studio Solution File, Format Version 12.00
-# Visual Studio 14
-VisualStudioVersion = 14.0.23107.0
+# Visual Studio 15
+VisualStudioVersion = 15.0.26228.4
 MinimumVisualStudioVersion = 10.0.40219.1
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "OpenFileInSolution", "OpenFileInSolution.csproj", "{89FE4454-2478-4AD2-BA39-263D5EC38B77}"
 EndProject

source.extension.vsixmanifest

@@ -9,7 +9,7 @@
     <Tags>open file, quick find</Tags>
   </Metadata>
   <Installation InstalledByMsi="false">
-    <InstallationTarget Id="Microsoft.VisualStudio.IntegratedShell" Version="[11.0, 14.0]" />
+    <InstallationTarget Id="Microsoft.VisualStudio.IntegratedShell" Version="[11.0, 15.0]" />
   </Installation>
   <Dependencies>
     <Dependency Id="Microsoft.Framework.NDP" DisplayName="Microsoft .NET Framework" d:Source="Manual" Version="[4.5,)" />
@@ -18,4 +18,7 @@
   <Assets>
     <Asset Type="Microsoft.VisualStudio.VsPackage" d:Source="Project" d:ProjectName="%CurrentProject%" Path="|%CurrentProject%;PkgdefProjectOutputGroup|" />
   </Assets>
+  <Prerequisites>
+    <Prerequisite Id="Microsoft.VisualStudio.ComponentGroup.VisualStudioExtension.Prerequisites" Version="[15.0.26208.0,16.0)" DisplayName="Visual Studio extension development prerequisites" />
+  </Prerequisites>
 </PackageManifest>