rbenv: install Ruby 2.6.3 by default

CHANGELOG.md

@@ -24,7 +24,7 @@ The **patch** part changes incrementally at each release.
 * evocheck : update (unreleased) from upstream
 * evomaintenance : use the web API instead of PG Insert
 * fluentd: store gpg key locally
-* rbenv: update defaults rbenv version to 1.1.2 and ruby version to 2.5.5
+* rbenv: update defaults rbenv version to 1.1.2 and ruby version to 2.6.3
 * redmine: update default version to 4.0.3
 * nagios-nrpe: change required status code for http and https check
 * redmine: use custom errors-pages in Nginx vhost

rbenv/defaults/main.yml

@@ -1,6 +1,6 @@
 ---
 rbenv_version: v1.1.2
-rbenv_ruby_version: 2.5.5
+rbenv_ruby_version: 2.6.3
 rbenv_root: "~/.rbenv"
 rbenv_repo: "https://github.com/rbenv/rbenv.git"
 rbenv_plugins: