ruby: update to version 2.7.2

ruby: update to version 2.7.2

This release contains intentional incompatibility. Deprecation warnings are
off by default on 2.7.2 and later. You can turn on deprecation warnings by
specifying the -w or -W:deprecated option at the command-line. Please check
the topics below for details.

* Feature #17000 2.7.2 turns off deprecation warnings by default
* Feature #16345 Don’t emit deprecation warnings by default.

This release contains the new version of webrick with a security fix described in the article.

* CVE-2020-25613: Potential HTTP Request Smuggling Vulnerability in WEBrick

Signed-off-by: Luiz Angelo Daros de Luca <luizluca@gmail.com>