Merge branch 'feature-feng-updateMahApp-20201203' of…

Merge branch 'feature-feng-updateMahApp-20201203' of http://private.flyautomation.net:82/panruising/thick_public into feature-feng-updateMahApp-20201203

Project.FLY.Thick.Base/FLY.Thick.Base.UI/FLY.Thick.Base.UI.csproj

@@ -601,7 +601,7 @@
       <Version>4.1.0</Version>
     </PackageReference>
     <PackageReference Include="EPPlus">
-      <Version>5.4.2</Version>
+      <Version>4.5.3.2</Version>
     </PackageReference>
     <PackageReference Include="MahApps.Metro">
       <Version>2.4.1</Version>