Bump puma from 3.12.2 to 3.12.3 (#974)

Bumps [puma](https://github.com/puma/puma) from 3.12.2 to 3.12.3.
- [Release notes](https://github.com/puma/puma/releases)
- [Changelog](https://github.com/puma/puma/blob/master/History.md)
- [Commits](https://github.com/puma/puma/compare/v3.12.2...v3.12.3)

Signed-off-by: dependabot[bot] <support@github.com>

Co-authored-by: Jesus Federico <jesus@123it.ca>

Gemfile.lock

@@ -211,7 +211,7 @@ GEM
     pg (0.21.0)
     popper_js (1.14.5)
     public_suffix (3.1.1)
-    puma (3.12.2)
+    puma (3.12.3)
     rack (2.0.7)
     rack-test (1.1.0)
       rack (>= 1.0, < 3)