Set Assembly version attribute for 1.19.1 release (PowerShell#1549)

* changes for 1.19.1 release

* add version to CrossCompatibility assembly

Changelog 1.19.0 update (PowerShell#1467)

* Changelog for 1.19.0

* Add recently merged PR 1447

* Update changelog with recent merges and use sub-headings for formatter section

* Apply suggestions from code review

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

Co-authored-by: Christoph Bergmeister <christoph.bergmeister@bjss.com>
Co-authored-by: Robert Holt <rjmholt@gmail.com>

Add Changelog for 1.18.3 and correct date of 1.18.2 release (PowerShe…

…ll#1338)

Add changelog for 1.18.2 (PowerShell#1323)

* Add changelog for 1.18.2

* tweak (parenthesis)

* add another detail

* Update CHANGELOG.MD with recent merges

* Update CHANGELOG.MD

Merge pull request PowerShell#1264 from PowerShell/development

bring master up to 1.18.1
the CI failure is not a test failure, but a result upload problem

Set Date of 1.18.0 release in Changelog (PowerShell#1180)

* Set Date of 1.18.0 release in Changelog

* Add PR 1179 to changelog as well

Merge pull request PowerShell#1018 from PowerShell/development

Merge changes of 1.17.1 (including 1.17.0) into Master

Update PossibleIncorrectComparisonWithNull.md (PowerShell#733)

* Update PossibleIncorrectComparisonWithNull.md

This is technically more accurate. PowerShell doesn't check for a $null in the array as was previously indicated.

* Update PossibleIncorrectComparisonWithNull.md

Revised description based on comments.

Merge pull request PowerShell#813 from PowerShell/v1.16.0

Prepare release v1.16.0

Merge pull request PowerShell#813 from PowerShell/v1.16.0

Prepare release v1.16.0