Bump mocha from 2.7.1 to 3.1.0

[dependabot]

Bumps mocha from 2.7.1 to 3.1.0.

Changelog

Sourced from mocha's changelog.

3.1.0

External changes

• Format warnings consistently and include source location (#794)

Internal changes

• Fix Style/OneClassPerFile violations (#796)
• Remove mise.toml which was added accidentally (6c5f84db)
• Add .ruby-version to .gitignore (8516ccc1)

3.0.2

External changes

• Fix NoMethodError on deprecation warning - broken since v3.0.0 (#790)

Internal changes

• Update commands in release docs to use bundle exec (7692c735)
• Fix test:performance rake task for minitest v6 (d925ad27)
• Fix prism gem install on JRuby (683c27b4)
• Add Ruby v4.0-rc to CI build matrix and change weekly build to nightly (#777)
• Add Ruby v4.0 to CI build matrix (6ced2025)
• Add irb to Gemfile to fix warning in Ruby v4 (a0fc7798)
• Auto-correct Style/EmptyClassDefinition violation (9ba0a09f)
• Ensure every test can run in isolation (be12ef06)
• Rename run-fail-fast CircleCI command -> run-fail-on-warning (72fc6fe8)

3.0.1

External changes

• Fix Mocha/RSpec integration by reinstating argument default value for Hooks#mocha_setup (#768 & #769) - thanks to @​mackuba for reporting.

3.0.0

External changes

• Improvements to docs for cardinality-related methods (#700)
• Drop support for Ruby v2.1 (#628 & #695)
• Improve gemspec description (#692 & #696)
• Remove docs for use_test_unit_gem option (eaf03493)
• Correct docs for MOCHA_OPTIONS "debug" value (69ef41c0)
• Use built-in Ruby debug option vs custom module (#714 & #715)
• Enable strict keyword argument matching by default in Ruby >= v3 (#697 & #718)
• Use Ruby v1.9 Hash syntax in Hash#mocha_inspect used in failure messages (#651 & #719)
• Improve #mocha_inspect for empty keyword argument Hash (#588 & #720) - thanks to @​herwinw for reporting
• Improve error if Mockery.teardown called before Mockery.setup (#611, #646 & #721) - thanks to @​riniculous for reporting

... (truncated)

Commits

• 3d08fea [skip ci] Update documentation for v3.1.0
• 55b7113 Bump version to 3.1.0 & prepare for release
• 84ff8a2 Merge pull request #794 from freerange/format-warnings-consistently-and-inclu...
• c569071 Make Expectation#definition_location consistent
• 8e2c12a Exclude source code from deprecation warning
• 69f93fa Extract BacktraceFilter#exclude?
• 0251ec1 Rename block variable from location -> line
• 88e22e4 Move source location to end of warning message
• 1713bfc Display source location for all warnings
• e5a8e7b Distinguish deprecation warnings in tests
• Additional commits viewable in compare view

Note
Automatic rebases have been disabled on this pull request as it has been open for over 30 days.