Update minitest requirement from ~> 5.4.0 to ~> 5.14.0

[dependabot-preview]

Updates the requirements on minitest to permit the latest version.

Changelog

Sourced from minitest's changelog.

=== 5.14.0 / 2020-01-11

• 2 minor enhancements:

  • Block-assertions (eg assert_output) now error if raised inside the block. (casperisfine)
  • Changed assert_raises to only catch Assertion since that covers Skip and friends.

• 3 bug fixes:

  • Added example for value wrapper with block to Expectations module. (stomar)
  • Fixed use of must/wont_be_within_delta on Expectation instance. (stomar)
  • Renamed UnexpectedError#exception to #error to avoid problems with reraising. (casperisfine)

=== 5.13.0 / 2019-10-29

• 9 minor enhancements:

  • Added Minitest::Guard#osx?
  • Added examples to documentation for assert_raises. (lxxxvi)
  • Added expectations #path_must_exist and #path_wont_exist. Not thrilled with the names.
  • Added fail_after(year, month, day, msg) to allow time-bombing after a deadline.
  • Added skip_until(year, month, day, msg) to allow deferring until a deadline.
  • Deprecated Minitest::Guard#maglev?
  • Deprecated Minitest::Guard#rubinius?
  • Finally added assert_path_exists and refute_path_exists. (deivid-rodriguez)
  • Refactored and pulled Assertions#things_to_diff out of #diff. (BurdetteLamar)

• 3 bug fixes:

  • Fix autorun bug that affects fork exit status in tests. (dylanahsmith/jhawthorn)
  • Improved documentation for _/value/expect, especially for blocks. (svoop)
  • Support new Proc#to_s format. (ko1)

=== 5.12.2 / 2019-09-28

• 1 bug fix:

  • After chatting w/ @y-yagi and others, decided to lower support to include ruby 2.2.

=== 5.12.1 / 2019-09-28

• 1 minor enhancement:

  • Added documentation for Reporter classes. (sshaw)

• 3 bug fixes:

  • Avoid using 'match?' to support older ruby versions. (y-yagi)
  • Fixed broken link to reference on goodness-of-fit testing. (havenwood)
  • Update requirements in readme and Rakefile/hoe spec.

... (truncated)

Commits

• d611604 prepped for release
• 1c9ba0c Closed temporary IOs when exiting capture_subprocess_io. (doudou)
• cdfb5b9 - Added example for value wrapper with block to Expectations module. (stomar)
• 5399dc5 Added minitest_log to known modules (BurdetteLamar)
• 96ba1da + Block-assertions (eg assert_output) now error if raised inside the block. (...
• 02e35ce - Fixed use of must/wont_be_within_delta on Expectation instance. (stomar)
• 58c0b2f + Changed assert_raises to only catch Assertion since that covers Skip and fr...
• 5802aa0 - Renamed UnexpectedError#exception to #error to avoid problems with reraisin...
• ecb1afe prepped for release
• 381e965 + Deprecated Minitest::Guard#maglev?
• Additional commits viewable in compare view

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[dependabot-preview]

Superseded by #80.