Bump mocha from 1.6.0 to 1.7.0 (#175)

Bumps [mocha](https://github.com/freerange/mocha) from 1.6.0 to 1.7.0.
- [Release notes](https://github.com/freerange/mocha/releases)
- [Changelog](https://github.com/freerange/mocha/blob/master/RELEASE.md)
- [Commits](https://github.com/freerange/mocha/compare/v1.6.0...v1.7.0)

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

Gemfile

@@ -30,7 +30,7 @@ gem 'webpacker', '~> 3.5'
 group :test do
   gem 'minitest-rails-capybara'
   gem 'minitest-ci'
-  gem 'mocha', '~> 1.6'
+  gem 'mocha', '~> 1.7'
   gem 'vcr', '~> 4.0'
   gem 'webmock', '~> 3.4'
 end

Gemfile.lock

@@ -179,7 +179,7 @@ GEM
       minitest-capybara (~> 0.8)
       minitest-metadata (~> 0.6)
       minitest-rails (~> 3.0)
-    mocha (1.6.0)
+    mocha (1.7.0)
       metaclass (~> 0.0.1)
     nio4r (2.3.1)
     nokogiri (1.8.4)
@@ -312,7 +312,7 @@ DEPENDENCIES
   local_time (~> 2.0)
   minitest-ci
   minitest-rails-capybara
-  mocha (~> 1.6)
+  mocha (~> 1.7)
   pg (~> 0.18)
   puma (~> 3.12)
   rack-cors (~> 1.0, >= 1.0.2)