Bump log4net from 2.0.8 to 2.0.10 in /src/SPCoder.WinApp

Bumps [log4net](https://github.com/apache/logging-log4net) from 2.0.8 to 2.0.10.
- [Release notes](https://github.com/apache/logging-log4net/releases)
- [Changelog](https://github.com/apache/logging-log4net/blob/master/ReleaseInstructions.txt)
- [Commits](apache/logging-log4net@rel/2.0.8...rel/2.0.10)

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

src/SPCoder.WinApp/packages.config

@@ -3,7 +3,7 @@
   <package id="AdamsLair.TreeViewAdv" version="1.7.7" targetFramework="net47" />
   <package id="DockPanelSuite" version="3.0.6" targetFramework="net47" />
   <package id="DockPanelSuite.ThemeVS2015" version="3.0.6" targetFramework="net47" />
-  <package id="log4net" version="2.0.8" targetFramework="net47" />
+  <package id="log4net" version="2.0.10" targetFramework="net47" />
   <package id="Microsoft.CodeAnalysis.Analyzers" version="3.0.0" targetFramework="net47" developmentDependency="true" />
   <package id="Microsoft.CodeAnalysis.Common" version="3.5.0" targetFramework="net47" />
   <package id="Microsoft.CodeAnalysis.CSharp" version="3.5.0" targetFramework="net47" />