Update dependency TUnit to version 1.20.0

Author: Nice3point

Directory.Packages.props

@@ -42,7 +42,7 @@
         <PackageVersion Include="ILRepack" Version="2.0.44"/>
 
         <!-- Testing -->
-        <PackageVersion Include="TUnit" Version="1.19.57"/>
+        <PackageVersion Include="TUnit" Version="1.20.0"/>
         <PackageVersion Include="Shouldly" Version="4.3.0"/>
 
         <!-- Development Tools -->