Update test-unit requirement from = 3.3.3 to = 3.3.4 (faker-ruby#1774)

* Two new locales added: th and en-th (faker-ruby#1773)

* Bump version to 2.5.0

* Update test-unit requirement from = 3.3.3 to = 3.3.4

Updates the requirements on [test-unit](https://github.com/test-unit/test-unit) to permit the latest version.
- [Release notes](https://github.com/test-unit/test-unit/releases)
- [Commits](test-unit/test-unit@3.3.3...3.3.4)

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

Gemfile.lock

@@ -39,7 +39,7 @@ GEM
       json (>= 1.8, < 3)
       simplecov-html (~> 0.10.0)
     simplecov-html (0.10.2)
-    test-unit (3.3.3)
+    test-unit (3.3.4)
       power_assert
     timecop (0.9.1)
     unicode-display_width (1.6.0)
@@ -55,7 +55,7 @@ DEPENDENCIES
   rake (= 12.3.3)
   rubocop (= 0.74.0)
   simplecov (= 0.17.1)
-  test-unit (= 3.3.3)
+  test-unit (= 3.3.4)
   timecop (= 0.9.1)
   yard (= 0.9.20)
 

faker.gemspec

@@ -34,7 +34,7 @@ Gem::Specification.new do |spec|
   spec.add_development_dependency('rake', '12.3.3')
   spec.add_development_dependency('rubocop', '0.74.0')
   spec.add_development_dependency('simplecov', '0.17.1')
-  spec.add_development_dependency('test-unit', '3.3.3')
+  spec.add_development_dependency('test-unit', '3.3.4')
   spec.add_development_dependency('timecop', '0.9.1')
   spec.add_development_dependency('yard', '0.9.20')
 end