master branch is now at 4.4.0

[BJ Hargrave]

As part of the release process for 4.3.0, the master branch is now at 4.4.0-SNAPSHOT. JFrog now has 4.4.0-SNAPSHOT builds. (Sonatype gave 50x errors on upload, so it does not have 4.4.0-SNAPSHOT at this time. Hopefully a future master build will successfully upload to sonatype.)

The next branch is now 4.3.0-SNAPSHOT and tagged 4.3.0.RC1. It is now building.

So all further PRs will merge into master and be part of 4.4.0. As we find issues in 4.3.0 RC builds, I will cherry pick fixes back from master into next to address them. Then we will release 4.3.0 from the next branch. (This is same process we followed for the 4.2.0 release.)