Bump MSTest.TestAdapter from 3.0.4 to 3.1.1 in /src (#937)

Author: dependabot[bot]

src/NugetUsage/MSTestNugetUsage/MSTestNugetUsage.csproj

@@ -6,7 +6,7 @@
   <ItemGroup>
     <!-- begin-snippet: mstest-nugets -->
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.6.3" />
-    <PackageReference Include="MSTest.TestAdapter" Version="3.0.4" />
+    <PackageReference Include="MSTest.TestAdapter" Version="3.1.1" />
     <PackageReference Include="MSTest.TestFramework" Version="3.1.1" />
     <PackageReference Include="Verify.MSTest" Version="20.5.0" />
     <!-- end-snippet -->

src/Verify.MSTest.DerivePaths.Tests/Verify.MSTest.DerivePaths.Tests.csproj

@@ -5,7 +5,7 @@
   </PropertyGroup>
   <ItemGroup>
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.6.3" />
-    <PackageReference Include="MSTest.TestAdapter" Version="3.0.4" />
+    <PackageReference Include="MSTest.TestAdapter" Version="3.1.1" />
     <PackageReference Include="MSTest.TestFramework" Version="3.1.1" />
     <PackageReference Include="ProjectDefaults" Version="1.0.91" PrivateAssets="all" />
     <ProjectReference Include="..\Verify.MSTest\Verify.MSTest.csproj" />

src/Verify.MSTest.Tests/Verify.MSTest.Tests.csproj

@@ -8,7 +8,7 @@
   </PropertyGroup>
   <ItemGroup>
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.6.3" />
-    <PackageReference Include="MSTest.TestAdapter" Version="3.0.4" />
+    <PackageReference Include="MSTest.TestAdapter" Version="3.1.1" />
     <PackageReference Include="MSTest.TestFramework" Version="3.1.1" />
     <PackageReference Include="ProjectDefaults" Version="1.0.91" PrivateAssets="all" />
     <ProjectReference Include="..\TargetLibrary\TargetLibrary.csproj" />