[py]: Update changelog for `4.3`

[java] Bumping Java to 4.2.1 and updating CHANGELOG

[skip ci]

[rb] update changelog and bump version for 4.2.1

[grid] Updating material UI libs

[skip ci]

bumping all versions to 4.2.0

[py] Amending changelog for 4.1.4

[skip ci]

[javascript] Update changelog for 4.1.2

[run javascript]

[java] Update changelog for 4.1.4

[run java]

[java] Update changelog for 4.1.3

[run java]

[py] bump python bindings to 4.1.3