Squirrel.Windows 1.7.6

What's New

• Fix crashes when using certain animated GIFs (#1061)
• Fix issue on .NET where old version of DeltaCompressionDotNet gets installed (#1057, thanks @rschoenbach)
• Add .NET 4.7 as an option for the required .NET version (#1055, thanks @lukeskinner)
• If a version of the app is installed that's higher than the latest remote version, don't continually download it anyways (#1001, thanks @ilyalopatkin)