Update Owin packages to v4 (major)

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change
Microsoft.Owin	nuget	major	3.1.0 -> 4.1.1
Microsoft.Owin.Diagnostics	nuget	major	3.1.0 -> 4.1.1
Microsoft.Owin.FileSystems	nuget	major	3.1.0 -> 4.1.1
Microsoft.Owin.Host.HttpListener	nuget	major	3.1.0 -> 4.1.1
Microsoft.Owin.Hosting	nuget	major	3.1.0 -> 4.1.1
Microsoft.Owin.SelfHost	nuget	major	3.1.0 -> 4.1.1
Microsoft.Owin.StaticFiles	nuget	major	3.1.0 -> 4.1.1

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Release Notes

aspnet/AspNetKatana

v4.1.1

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This release includes a security fix and some minor improvements. The packages are available on nuget.org.

• CVE-2020-1045 also applies to Microsoft.Owin.
• See here for the complete list of changes.

v4.1.0

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v4.0.1

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v4.0.0

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