Update minitest requirement from = 5.11.3 to = 5.12.0 (faker-ruby#1763)

Updates the requirements on [minitest](https://github.com/seattlerb/minitest) to permit the latest version.
- [Release notes](https://github.com/seattlerb/minitest/releases)
- [Changelog](https://github.com/seattlerb/minitest/blob/master/History.rdoc)
- [Commits](minitest/minitest@v5.11.3...v5.12.0)

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

Gemfile.lock

@@ -16,7 +16,7 @@ GEM
     jaro_winkler (1.5.3)
     json (2.2.0)
     method_source (0.9.2)
-    minitest (5.11.3)
+    minitest (5.12.0)
     parallel (1.17.0)
     parser (2.6.4.0)
       ast (~> 2.4.0)
@@ -50,7 +50,7 @@ PLATFORMS
 
 DEPENDENCIES
   faker!
-  minitest (= 5.11.3)
+  minitest (= 5.12.0)
   pry (= 0.12.2)
   rake (= 12.3.3)
   rubocop (= 0.74.0)

faker.gemspec

@@ -29,7 +29,7 @@ Gem::Specification.new do |spec|
 
   spec.add_dependency('i18n', '~> 1.6.0')
 
-  spec.add_development_dependency('minitest', '5.11.3')
+  spec.add_development_dependency('minitest', '5.12.0')
   spec.add_development_dependency('pry', '0.12.2')
   spec.add_development_dependency('rake', '12.3.3')
   spec.add_development_dependency('rubocop', '0.74.0')