changelog for v2.1.0-preview.1 (PowerShell#1236)

* changelog

* Apply suggestions from code review

Co-Authored-By: Robert Holt <rjmholt@gmail.com>

Co-authored-by: Robert Holt <rjmholt@gmail.com>

Make session-state lock task-reentrant (PowerShell#1217)

[Ignore] Install pwsh when needed in release builds (PowerShell#1202)

[Ignore] Update CHANGELOG.md to include PR PowerShell#1158 (PowerShel…

…l#1159)

[Ignore] Update CHANGELOG.md to include PR PowerShell#1158 (PowerShel…

…l#1159)

[Ignore] Update version + changelog for 1.13.3 (PowerShell#1153)

* [Ignore] Update version + changelog for 1.13.3

* fix version

[Ignore[ Fix CHANGELOG, improve build cleaning (PowerShell#1133)

* Use copy -force

* Take out banner space

* Update Changelog to match vscode

[Ignore] Update version + changelog for 1.13.2 (PowerShell#1134)

Fix highlighting offset (PowerShell#1084)

* Fix highlighting offset

* Change test offsets

* Fix initial offset

* Change offsets

* Try again

Increment min PSSA version (PowerShell#1089)