Micronaut Test 3.1.1

What's Changed

• [test] Update common files for branch master by @micronaut-build in #526
• build: update build plugin to 5.2.3 by @sdelamo in #525
• ci: change githubCoreBranch to 3.4.x by @sdelamo in #524

Full Changelog: v3.1.0...v3.1.1