SharpZipLib breaking changes

• v1.0.0-rc2 \u2192 v1.0.0breaking

  **.NET Framework 4.5** `net45` (Mono 4, Dependency-free on Windows 8+/2012+) See [.NET implementation support](https://docs.microsoft.com/en-us/dotnet/standard/net-standard#net-implementation-support)

• v1.0.0-rc2 \u2192 v1.0.0breaking

  The library is now released under the MIT license. See [Issue #103](https://github.com/icsharpcode/SharpZipLib/issues/103).

• v1.0.0-rc2 \u2192 v1.0.0breaking

  The legacy Stream API has been replaced by the IDisposable pattern. (Stream.Close() calls Dispose(true) by default, so it should be backwards compatible) See [Stream.Close Method](https://docs.microsoft.com/en-us/dotnet/api/system.io.stream.close?view=netstandard-2.0).

• v1.0.0-rc2 \u2192 v1.0.0breaking

  The targeted frameworks are now:

• v1.0.0-rc2 \u2192 v1.0.0breaking

  **.NET Standard 2.0** `netstandard2` (Core 2.0+, FW 4.6.1+, Mono 5.2+, UWP 16299)

• 0.85.0.0 \u2192 0.85.1.271breaking

  Fix for Zip64 descriptor handling.

• 0.85.0.0 \u2192 0.85.1.271breaking

  Add preliminary implementation for handlng of full unicode names.

• 0.85.0.0 \u2192 0.85.1.271breaking

  Fix up encryption handling for ZipFile during updates.

• 0.85.0.0 \u2192 0.85.1.271breaking

  Update to Compact Framework handling to cater for CF 2.0 as well as 1.0 (minus encryption for 1.0)

• 0.85.0.0 \u2192 0.85.1.271breaking

  Zip64 handling altered to default to "Zip32" for compatability.

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