chore(deps): update dependency polyshim to 2.9.0 (#220)

Co-authored-by: thecluster-bot[bot] <98929874+thecluster-bot[bot]@users.noreply.github.com>

Author: thecluster-bot[bot]

src/CliWrap.Tests.Dummy/CliWrap.Tests.Dummy.csproj

@@ -9,7 +9,7 @@
 
   <ItemGroup>
     <PackageReference Include="CliFx" Version="2.3.6" />
-    <PackageReference Include="PolyShim" Version="2.8.2" PrivateAssets="all" />
+    <PackageReference Include="PolyShim" Version="2.9.0" PrivateAssets="all" />
   </ItemGroup>
 
 </Project>