Releasing v2.6

* Workaround for NullReferenceException when extracting multiple 7zip…

… archives simultaneously on PS 7.4.0 (contributed by [@kborowinski](https://github.com/kborowinski) in [#89](#89))

* Adds new parameter `EncryptionMethod` to `Compress-7Zip`
* Updates of 7-Zip libraries to version 24.06 (support for ZSTD decompression ) (contributed by [@kborowinski](https://github.com/kborowinski) in [#90](#90))
* Updates Squid-Box.SevenZipSharp nuget package to version 1.6.2.24 (final release -the project has been archived) (contributed by [@kborowinski](https://github.com/kborowinski) in [#90](#90))
* Adds support for Wim (contributed by [@pysj](https://github.com/pysj) in [#87](#87))

updates readme

Adds TempFolder parameter to Compress-7Zip (closes #78)

Updates readme

updates readme for v2.1

updated readme and copyright

Set minimum requirement to PS 5.0 and .NET Framework 4.7.2