Adding code coverage support

src/GuardClauses.UnitTests/GuardClauses.UnitTests.csproj

@@ -1,4 +1,4 @@
-<Project Sdk="Microsoft.NET.Sdk">
+<Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
     <TargetFramework>netcoreapp2.0</TargetFramework>
@@ -7,7 +7,13 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="15.5.0" />
+    <PackageReference Include="altcover" Version="4.0.644" />
+    <PackageReference Include="coverlet.msbuild" Version="2.3.1">
+      <IncludeAssets>runtime; build; native; contentfiles; analyzers</IncludeAssets>
+      <PrivateAssets>all</PrivateAssets>
+    </PackageReference>
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="15.9.0" />
+    <PackageReference Include="ReportGenerator" Version="4.2.5" />
     <PackageReference Include="xunit" Version="2.3.1" />
     <PackageReference Include="xunit.runner.visualstudio" Version="2.3.1" />
   </ItemGroup>

src/GuardClauses/GuardClauses.csproj

@@ -12,8 +12,8 @@
     <Summary>A simple package with guard clause helper methods. See docs for how to extend using your own extension methods.</Summary>
     <RepositoryUrl>https://github.com/ardalis/guardclauses</RepositoryUrl>
     <PackageTags>guard clause clauses assert assertion</PackageTags>
-    <PackageReleaseNotes>Added enum support to Guard.Against.OutOfRange. </PackageReleaseNotes>
-    <Version>1.2.8</Version>
+    <PackageReleaseNotes>Added Guard.Against.Default support.</PackageReleaseNotes>
+    <Version>1.2.9</Version>
     <AssemblyName>Ardalis.GuardClauses</AssemblyName>
     <PackageIconUrl>https://user-images.githubusercontent.com/782127/52231271-7d561400-2887-11e9-9ca5-648259e60b37.png</PackageIconUrl>
     <PublishRepositoryUrl>true</PublishRepositoryUrl>