Update protobuf version (protocolbuffers#9167)

Update protobuf version (protocolbuffers#9119)

Update version to 3.19.0-rc2 and fix changelog about Java 7 (protocol…

…buffers#9116)

* Update protobuf version

* Update CHANGES.txt to reflect that we're not yet dropping Java 7

Update PHP release notes for 3.19.0 (protocolbuffers#9110)

Update protobuf version to 3.18.1 (protocolbuffers#9051)

* Update protobuf version

* Update PHP release notes in package.xml

Update change log (protocolbuffers#8974)

Adding missing "," (protocolbuffers#8943)

Update change log (protocolbuffers#8888)

* Update change log

Merge pull request protocolbuffers#8701 from protocolbuffers/updateCh…

…angelogs

Updating changelog

Merge pull request protocolbuffers#8686 from protocolbuffers/addToCha…

…nges

Adding PHP fix to changes for 3.17.2