Changelog for 2.20.3

Update changelog for 2.20.2

Add known issue for Windows exe properties version number

Update changelog for 2.20.0

Merge pull request #185 from github/alexet/add-change-log-2.19.4

Add changelog for 2.19.4

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Merge pull request #181 from github/angelapwen/add-changelog-2-19-2

Add CLI v2.19.2 changelog entry

Merge pull request #180 from github/smowton/admin/update-2.19.0-1

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