Bump test-unit from 3.3.4 to 3.3.5 (#7175)

Bumps [test-unit](https://github.com/test-unit/test-unit) from 3.3.4 to 3.3.5.
- [Release notes](https://github.com/test-unit/test-unit/releases)
- [Commits](test-unit/test-unit@3.3.4...3.3.5)

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

Gemfile.lock

@@ -505,7 +505,7 @@ GEM
       teaspoon (>= 1.0.0)
     terrapin (0.6.0)
       climate_control (>= 0.0.3, < 1.0)
-    test-unit (3.3.4)
+    test-unit (3.3.5)
       power_assert
     therubyracer (0.12.3)
       libv8 (~> 3.16.14.15)