Bump stringex from 1.5.1 to 2.8.5

Bumps [stringex](https://github.com/rsl/stringex) from 1.5.1 to 2.8.5.
- [Release notes](https://github.com/rsl/stringex/releases)
- [Commits](https://github.com/rsl/stringex/compare/v1.5.1...v2.8.5)

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

Gemfile

@@ -29,7 +29,7 @@ gem 'money', '< 6.1.0'
 gem 'paranoia', '~> 2.0'
 gem 'ransack', '~> 1.8.10'
 gem 'state_machines-activerecord'
-gem 'stringex', '~> 1.5.1'
+gem 'stringex', '~> 2.8.5'
 
 gem 'spree_i18n', github: 'openfoodfoundation/spree_i18n', branch: '1-3-stable'
 

Gemfile.lock

@@ -674,7 +674,7 @@ GEM
     state_machines-activerecord (0.6.0)
       activerecord (>= 4.1)
       state_machines-activemodel (>= 0.5.0)
-    stringex (1.5.1)
+    stringex (2.8.5)
     stripe (5.28.0)
     temple (0.8.2)
     test-prof (0.7.5)
@@ -825,7 +825,7 @@ DEPENDENCIES
   spring
   spring-commands-rspec
   state_machines-activerecord
-  stringex (~> 1.5.1)
+  stringex (~> 2.8.5)
   stripe
   test-prof
   test-unit (~> 3.3)