Update versions.txt v4.0.0 (#72)

adapt base version to v4.0.0 

# Checklist

The following aspects have been respected by the author of this pull
request, confirmed by both pull request assignee **and** reviewer:

* Changelog update (necessity checked and entry added or not added
respectively)
  * [x] Pull Request Assignee
  * [x] Reviewer
* README update (necessity checked and entry added or not added
respectively)
  * [x] Pull Request Assignee
  * [x] Reviewer

config/versions.txt

@@ -1,4 +1,4 @@
-BASE_PACKAGE_VERSION=3.1.0
+BASE_PACKAGE_VERSION=4.0.0
 COMMON_PROTOC_VERSION=24.1
 JAVA_PROTOC_VERSION=3.24.1
 JAVA_GRPC_VERSION=1.58.0