Support for net45

Author: AArnott

src/Xunit.SkippableFact.Tests/Xunit.SkippableFact.Tests.csproj

@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>net461;netcoreapp1.0</TargetFrameworks>
+    <TargetFrameworks>net45;net461;netcoreapp1.0</TargetFrameworks>
     <IsPackable>false</IsPackable>
   </PropertyGroup>
   <ItemGroup>

src/Xunit.SkippableFact/Xunit.SkippableFact.csproj

@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>netstandard1.1;net452</TargetFrameworks>
+    <TargetFrameworks>netstandard1.1;net45;net452</TargetFrameworks>
     <RootNamespace>Xunit</RootNamespace>
     <CodeAnalysisRuleSet>Xunit.SkippableFact.ruleset</CodeAnalysisRuleSet>
     <SignAssembly>true</SignAssembly>
@@ -17,7 +17,8 @@
   </PropertyGroup>
   <ItemGroup>
     <PackageReference Include="Validation" Version="2.4.15" PrivateAssets="compile;contentfiles;analyzers;build" />
-    <PackageReference Include="xunit.extensibility.execution" Version="2.2.0" />
+    <PackageReference Include="xunit.extensibility.execution" Version="2.1.0" Condition=" '$(TargetFramework)' == 'net45' " />
+    <PackageReference Include="xunit.extensibility.execution" Version="2.2.0" Condition=" '$(TargetFramework)' != 'net45' " />
     <PackageReference Include="StyleCop.Analyzers" Version="1.0.0" PrivateAssets="all" />
   </ItemGroup>
   <Target Name="SetNuSpecProperties" BeforeTargets="GenerateNuspec" DependsOnTargets="GetBuildVersion">