Bump error-prone to 2.28.0
-rw-r--r-- 37 .gitattributes
-rw-r--r-- 173 .gitignore
-rw-r--r-- 90 .gitreview
-rw-r--r-- 374 .readthedocs.yml
-rw-r--r-- 1534 INFO.yaml
drwxr-xr-x - artifacts
drwxr-xr-x - common
drwxr-xr-x - diagstatus
drwxr-xr-x - docs
drwxr-xr-x - features
drwxr-xr-x - inject
drwxr-xr-x - itestutils
drwxr-xr-x - karaf
-rw-r--r-- 3768 pom.xml
drwxr-xr-x - ready
drwxr-xr-x - testutils
-rw-r--r-- 191 tox.ini