fixed test method being inlined

That would cause ApprovalTests to fail finding the NUnit method invoking the test and fail the test with unhelpful error

Author: kkozmic

ConventionTests/Conventions/__Run.cs

@@ -2,13 +2,15 @@
 using System.IO;
 using System.Linq;
 using System.Reflection;
+using System.Runtime.CompilerServices;
 using ApprovalTests.Reporters;
 using NUnit.Framework;
 
 [assembly: UseReporter(typeof (DiffReporter))]
 
 namespace ConventionTests
 {
+
     [TestFixture]
     public class ConventionTestsRunner
     {
@@ -53,6 +55,7 @@ private static bool IsConventionTest(Type type)
 
         [Test]
         [TestCaseSource("Conventions")]
+        [MethodImpl(MethodImplOptions.NoInlining)]
         public void Run(IConventionTest test)
         {
             test.Execute();