updating version numbers and release notes for 2.11.3

updating version numbers and release notes for 2.12.0

updating version numbers and release notes for 2.12-RC1

updating version numbers and release notes for 2.12-beta

updating version numbers and release notes for 2.10.5

updating version numbers and release notes for 2.11.2

updating version numbers and release notes for 2.10.4

updating version numbers and release notes for 2.11.1

updating version numbers and release notes for 2.11.0

updating version numbers and release notes for 2.10.3