Update mocha requirement from ~> 2.1.0 to ~> 2.2.0

[dependabot]

Updates the requirements on mocha to permit the latest version.

Changelog

Sourced from mocha's changelog.

2.2.0

External changes

• Support multiple methods in responds_with matcher (f086b7e4, #578) - thanks to @​vlad-pisanov for the suggestion

• Add block syntax for sequences (93fdffd, #61)

• Improve sequence failure message (0800c6ff, #60)

• Drop support for Ruby v2.0 (85848fb0, #642)

• Include the original test name in expired stub error messages (ca3ff8eb, #641, #642) - thanks to @​casperisfine

• Avoid rubocop directive ending up in YARD docs (2a9ee81a)

• Update docs to fix those for Mock#method_missing (cee0bad6)

• Reinstate missing CNAME for GitHub Pages site (da67bb0d)

• Use Ruby v1.9 Hash syntax in docs (6de20726, #625)

• Add missing YARD tag for API#sequence name param (343c5979)

• Add missing YARD tag for API#states name param (f798df83)

Internal changes

• Tidy up Minitest vs MiniTest references (#626, #614, #615) - thanks to @​zenspider & @​Maimer for their help
• Add Ruby v3.3 to CI build matrix (ce31b544)

2.1.0

External changes

• Fix compatibility with Minitest (#614) - thanks to @​kyrofa & @​manewitz for reporting and to @​zenspider for his input

Internal changes

• Update URLs for links to Ruby & MIT licenses (d6470af4)

2.0.4

Internal changes

• Update README.md (e8c21e1b)

2.0.3

External changes

• Fix BacktraceFilter to handle special characters (e242033f, #592) - thanks to @​casperisfine

Internal changes

• Add Ruby v3.1 to the CircleCI build (3e460489)
• DRY up regexp_matches test (ae9fed4a)
• Fix regexp_matches tests in Ruby v3.2 (26b106a5, #590)
• Use Ruby 1.9 hash syntax (8bc0ad2f, #598, #537) - thanks to @​herwinw

... (truncated)

Commits

• 5324009 [skip ci] Update documentation for v2.2.0
• 76495e1 Bump version to 2.2.0 & prepare for release
• 9d2b88e Include the original test name in expired stub error messages
• 85848fb Drop support for Ruby v2.0
• ce31b54 Add Ruby v3.3 to CI build matrix
• 0800c6f Improve sequence failure message
• 93fdffd Add block syntax for sequences
• f798df8 Add missing YARD tag for API#states name param
• 343c597 Add missing YARD tag for API#sequence name param
• 6de2072 Use Ruby v1.9 Hash syntax in docs
• Additional commits viewable in compare view

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