[7.1.0-preview.7] - 2020-09-08

* Breaking Changes

- Fix `$?` to not be `$false` when native command writes to `stderr` (#13395)

* Engine Updates and Fixes

- Initial work of the subsystem plugin model (for minimal powershell) (#13186)
- Optimize `GetSystemLockdownPolicy` for non-lockdown scenarios (#13438)

* General Cmdlet Updates and Fixes

- Revert 'Add the parameter `-Paged` to `Get-Help` to support paging (#13374)' (#13519)
- Add support for `TLS` 1.3 in Web cmdlets (#13409) (Thanks @iSazonov!)
- Add null check for `args` in `CommandLineParser` (#13451) (Thanks @iSazonov!)
- Process reparse points for Microsoft Store applications (#13481) (Thanks @iSazonov!)
- Move `PSNullConditionalOperators` feature out of experimental (#13529)
- Move `PSNativePSPathResolution` feature out of Experimental (#13522)
- Use field if property does not exist for `ObRoot` when using PowerShell Direct to container (#13375) (Thanks @hemisphera!)
- Suppress `UTF-7` obsolete warnings (#13484)
- Avoid multiple enumerations of an `IEnumerable<Expression>` instance in `Compiler.cs` (#13491)
- Change `Add-Type -OutputType` to not support `ConsoleApplication` and `WindowsApplication` (#13440)
- Create warnings when `UTF-7` is specified as an encoding (#13430)

* Code Cleanup

<details>

<summary>

<p>We thank the following contributors!</p>
<p>@xtqqczze, @tamasvajk</p>

</summary>

<ul>
<li>Add single blank line after copyright header (#13486) (Thanks @xtqqczze!)</li>
<li>Use read-only auto-implemented properties (#13507) (Thanks @xtqqczze!)</li>
<li>Use boolean instead of bitwise operators on bool values (#13506) (Thanks @xtqqczze!)</li>
<li>Fix erroneous assert (#13495) (Thanks @tamasvajk!)</li>
<li>Cleanup: remove duplicate words in comments (#13539) (Thanks @xtqqczze!)</li>
<li>Reformat <code>StringUtil</code> (#13509) (Thanks @xtqqczze!)</li>
<li>Use <code>uint</code> instead of <code>long</code> for <code>PDH</code> constants (#13502) (Thanks @xtqqczze!)</li>
<li>Cleanup: Remove redundant empty lines (#13404) (Thanks @xtqqczze!)</li>
<li>Add <code>StringUtil.Format</code> overload to avoid unnecessary allocations (#13408) (Thanks @xtqqczze!)</li>
<li>Fix test hooks for <code>CommandLineParameterParser</code> (#13459)</li>
<li>Remove redundant delegate creation (#13441) (Thanks @xtqqczze!)</li>
</ul>

</details>

* Tools

- vscode: Add `editorconfig` to recommended extensions (#13537) (Thanks @xtqqczze!)
- Remove the out-dated `ZapDisable` related code from `build.psm1` (#13350) (Thanks @jackerr3!)

* Tests

- Disable `WMF` download link validation test (#13479)

* Build and Packaging Improvements

<details>

<summary>

<p>We thank the following contributors!</p>
<p>@yecril71pl</p>

</summary>

<ul>
<li>Add <code>Microsoft.NET.Test.Sdk</code> dependency (Internal 12589)</li>
<li>Update .NET NuGet package version to <code>5.0.0-preview.8.20407.11</code> (Internal 12555)</li>
<li>Update to .NET 5 preview 8 (#13530)</li>
<li>Change stage dependency for docker release stage in release pipeline (#13512)</li>
<li>Bump <code>Microsoft.NET.Test.Sdk</code> from 16.7.0 to 16.7.1 (#13492)</li>
<li>Create the folder before copying the global tools (#13476)</li>
<li>A few fixes to the release pipeline (#13473)</li>
<li>Bump <code>Markdig.Signed</code> from 0.20.0 to 0.21.1 (#13463)</li>
<li>Add a pre-check for git to <code>build.psm1</code> (#13227) (Thanks @yecril71pl!)</li>
</ul>

</details>

* Documentation and Help Content

- Update `README` links and `metadata.json` for `7.1.0-preview.6` (#13437)

[7.1.0-preview.7]: https://github.com/PowerShell/PowerShell/compare/v7.1.0-preview.6...v7.1.0-preview.7