Bump puma from 5.3.2 to 5.6.1 in /spec/integration/rails_5.2.4.1 (#925)

Bumps [puma](https://github.com/puma/puma) from 5.3.2 to 5.6.1.
- [Release notes](https://github.com/puma/puma/releases)
- [Changelog](https://github.com/puma/puma/blob/master/History.md)
- [Commits](puma/puma@v5.3.2...v5.6.1)

---
updated-dependencies:
- dependency-name: puma
  dependency-type: direct:production
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

spec/integration/rails_5.2.4.1/Gemfile

@@ -6,7 +6,7 @@ gem 'rails', '~> 5.2.4', '>= 5.2.4.1'
 # Use sqlite3 as the database for Active Record
 gem 'sqlite3'
 # Use Puma as the app server
-gem 'puma', '~> 5.3'
+gem 'puma', '~> 5.6'
 # Use SCSS for stylesheets
 gem 'sass-rails', '~> 5.0'
 # Use Uglifier as compressor for JavaScript assets

spec/integration/rails_5.2.4.1/Gemfile.lock

@@ -105,11 +105,11 @@ GEM
     mini_portile2 (2.4.0)
     minitest (5.14.4)
     msgpack (1.4.2)
-    nio4r (2.5.7)
+    nio4r (2.5.8)
     nokogiri (1.10.10)
       mini_portile2 (~> 2.4.0)
     public_suffix (4.0.6)
-    puma (5.3.2)
+    puma (5.6.1)
       nio4r (~> 2.0)
     rack (2.2.3)
     rack-test (1.1.0)
@@ -200,7 +200,7 @@ DEPENDENCIES
   coffee-rails (~> 4.2)
   jbuilder (~> 2.5)
   listen (>= 3.0.5, < 3.2)
-  puma (~> 5.3)
+  puma (~> 5.6)
   rails (~> 5.2.4, >= 5.2.4.1)
   sass-rails (~> 5.0)
   selenium-webdriver