Update change log

Release for march 2018 (microsoft#4931)

* New version
* Updated change log

Release 2019.2.2

Bump version for hot fix microsoft#4566

2019.2.0 final (microsoft#4553)

Update versio of PTSVD to 4.2.3

Preparation for 2018.12.1 point release (microsoft#3708)

* Preparation for 2018.12.1 point release
* Add info for failing PlatformService test on Windows CI agent
* Remove use of node.os package in favour of the 'arch' package to test is64bit

Prepare for release to production. (microsoft#3687)

2018.11.0 (microsoft#3507)

Update issue title