docs: add changelog for 4.3.0

docs: add changelog for 4.3.0-rc.0

docs: add changelog for 4.2.6

docs: add changelog for 4.2.5

docs: add changelog for 4.3.0-beta.1

docs: add changelog for 4.3.0-beta.0

docs: add changelog for 4.2.4

docs: add changelog for 4.2.3

docs: add changelog for 4.2.2

docs: add changelog for 4.2.1