Bump puma from 3.9.1 to 3.10.0 (#4879)

Bumps [puma](https://github.com/puma/puma) from 3.9.1 to 3.10.0.
- [Release notes](https://github.com/puma/puma/releases/tag/v3.10.0)
- [Changelog](https://github.com/puma/puma/blob/master/History.md)
- [Commits](https://github.com/puma/puma/compare/v3.9.1...v3.10.0)

Gemfile.lock

@@ -323,7 +323,7 @@ GEM
     pry-rails (0.3.6)
       pry (>= 0.10.4)
     public_suffix (3.0.0)
-    puma (3.9.1)
+    puma (3.10.0)
     pundit (1.1.0)
       activesupport (>= 3.0.0)
     rabl (0.13.1)
@@ -582,7 +582,7 @@ DEPENDENCIES
   pghero (~> 1.7)
   pkg-config (~> 1.2)
   pry-rails (~> 0.3)
-  puma (~> 3.8)
+  puma (~> 3.10)
   pundit (~> 1.1)
   rabl (~> 0.13)
   rack-attack (~> 5.0)