Bump mocha from 2.5.0 to 2.6.0 (#5277)

Bumps [mocha](https://github.com/freerange/mocha) from 2.5.0 to 2.6.0.
- [Changelog](https://github.com/freerange/mocha/blob/main/RELEASE.md)
- [Commits](freerange/mocha@v2.5.0...v2.6.0)

---
updated-dependencies:
- dependency-name: mocha
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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

Gemfile

@@ -136,7 +136,7 @@ group :test do
   gem "launchy", "~> 3.0"
   gem "rack-test", "~> 2.1", require: "rack/test"
   gem "rails-controller-testing", "~> 1.0"
-  gem "mocha", "~> 2.5", require: false
+  gem "mocha", "~> 2.6", require: false
   gem "shoulda-context", "~> 3.0.0.rc1"
   gem "shoulda-matchers", "~> 6.4"
   gem "selenium-webdriver", "~> 4.27"

Gemfile.lock

@@ -467,7 +467,7 @@ GEM
       ruby-progressbar
     minitest-retry (0.2.3)
       minitest (>= 5.0)
-    mocha (2.5.0)
+    mocha (2.6.0)
       ruby2_keywords (>= 0.0.5)
     msgpack (1.7.5)
     multi_json (1.15.0)
@@ -927,7 +927,7 @@ DEPENDENCIES
   minitest-gcstats (~> 1.3)
   minitest-reporters (~> 1.7)
   minitest-retry (~> 0.2.3)
-  mocha (~> 2.5)
+  mocha (~> 2.6)
   observer (~> 0.1.2)
   octokit (~> 9.2)
   omniauth (~> 2.1)
@@ -1159,7 +1159,7 @@ CHECKSUMS
   minitest-gcstats (1.3.1) sha256=cb25490f93aac02e3a5ff307e560d41afcdcafa7952c1c32efdeb9886b1f4711
   minitest-reporters (1.7.1) sha256=5060413a0c95b8c32fe73e0606f3631c173a884d7900e50013e15094eb50562c
   minitest-retry (0.2.3) sha256=7b7f4896efb9b931a1acb442a40e5273c441f44946cf4c6a8eb8895838e7bf29
-  mocha (2.5.0) sha256=7852595064e8ef4c6a3f6d8a5a5ab8c705168f913bb17929ab1c35f4dd4c7717
+  mocha (2.6.0) sha256=76ac4f4702d7c86be602e61a957f719e7e9df48ac3799b1a892655ca416a5638
   msgpack (1.7.5) sha256=ffb04979f51e6406823c03abe50e1da2c825c55a37dee138518cdd09d9d3aea8
   multi_json (1.15.0) sha256=1fd04138b6e4a90017e8d1b804c039031399866ff3fbabb7822aea367c78615d
   multi_xml (0.7.1) sha256=4fce100c68af588ff91b8ba90a0bb3f0466f06c909f21a32f4962059140ba61b