Bump log4net in /src/Ninject.Extensions.Logging.Log4Net (#47)
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](https://github.com/apache/logging-log4net/compare/rel/2.0.8...rel/2.0.10)
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