Edit changelog

change configure.ac to use c++ version

Merge pull request protocolbuffers#9832 from haberman/php-dist

Fixed PHP release script.

Update changelogs for 3.20.1-rc1

Added missing files and fixed file roles. (protocolbuffers#9672)

Added missing files and fixed file roles. (protocolbuffers#9672)

Merge pull request protocolbuffers#9640 from protocolbuffers/toolchai…

…nCleanup

Toolchain cleanups

Update tests.sh to locally install all Java packages, not just util

The JRuby test runs appear to be fetching the util package from Maven
Central because it is not being installed locally. This causes the tests
to fail when we upgrade to a new version that has not yet been published
to Maven Central. This commit fixes the problem by locally installing
all the protobuf packages, not just util.

Update protobuf version for 3.19.4 (protocolbuffers#9449)

I also updated the PHP release notes in
php/ext/google/protobuf/package.xml.

Update protobuf version