Update "mocha" to version ~3.1.0

[dependency-updater]

3.1.0 / 2016-09-27
==================

  * Release v3.1.0
  * build dist for v3.1.0
  * CHANGELOG for v3.1.0 [ci skip]
  * fix diff output for String objects; closes [#2496](https://github.com/mochajs/mocha/issues/2496) ([#2499](https://github.com/mochajs/mocha/issues/2499))
    - rename some exported functions/vars as to use locally
    - update JSDoc comments
    - includes IE7/8 support
  * ensure windows compat with stack trace filter; closes [#2502](https://github.com/mochajs/mocha/issues/2502) ([#2503](https://github.com/mochajs/mocha/issues/2503))
    - also removed component-related cruft
    - skip stack tests by OS
  * fix problems with only/skip in IE7/IE8
  * use HTML reporter and default to autoWatch/singleRun mode
    - use `--single-run` to execute once and exit (this is done in `Makefile`)
  * attempt windows-friendly reproducible case for [#2315](https://github.com/mochajs/mocha/issues/2315)
  * fix: fix uncaught TypeError if error occurs on next tick, closes [#2315](https://github.com/mochajs/mocha/issues/2315) ([#2439](https://github.com/mochajs/mocha/issues/2439))
  * helpful error when necessary suite callback omitted; closes [#1744](https://github.com/mochajs/mocha/issues/1744)
    - works for QUnit as well
    - renamed some files
    - fixed unclear "only" tests
  * Fix an issue and add relevant tests when describe and xdescribe fail when not supplied with a callback (issue [#1744](https://github.com/mochajs/mocha/issues/1744)).
  * Merge branch 'issue/2383'
    * issue/2383:
    rename more fixtures; closes [#2383](https://github.com/mochajs/mocha/issues/2383)
    fix test files not using .spec suffix fix test fixtures not using .fixture suffix
  * rename more fixtures; closes [#2383](https://github.com/mochajs/mocha/issues/2383)
  * Report non-match to STDERR and exit if no files are matched ([#2450](https://github.com/mochajs/mocha/issues/2450))
    * Report non-matching patterns to STDERR and exit with non-zero status if no files are matched at all. Fixes [#2194](https://github.com/mochajs/mocha/issues/2194)
    * Code review changes
  * Exit process with correct error codes ([#2445](https://github.com/mochajs/mocha/issues/2445))
    * Exit with code 130 in SIGINT. Refs [#2438](https://github.com/mochajs/mocha/issues/2438)
    * Exit with code 255 if more errors than 255 were returned. Fixes [#2438](https://github.com/mochajs/mocha/issues/2438)
  * fix test files not using .spec suffix
    fix test fixtures not using .fixture suffix
  * always halt execution when async skip() called; closes [#2465](https://github.com/mochajs/mocha/issues/2465) ([#2479](https://github.com/mochajs/mocha/issues/2479))
    - always halt execution when async skip() called; closes [#2465](https://github.com/mochajs/mocha/issues/2465)
    - also fixes lack of support for async `skip()` when `allowUncaught` option is used
    - adds some debuggability into `this.skip()` calls
    - avoid double-failure conditions when using this.skip()
    - fix bad Runner tests; lint & add test/runner.js to check
  * avoid test flake in "delay" test; closes [#2469](https://github.com/mochajs/mocha/issues/2469) ([#2470](https://github.com/mochajs/mocha/issues/2470))
  * revert accidental change to bin paths
  * disregard function names when testing under Node.js 6.5.0; closes [#2467](https://github.com/mochajs/mocha/issues/2467) ([#2477](https://github.com/mochajs/mocha/issues/2477))
  * Merge pull request [#2458](https://github.com/mochajs/mocha/issues/2458) from mochajs/issue/2457
    lints more files; add more files to lint check; closes [#2457](https://github.com/mochajs/mocha/issues/2457)
  * Merge pull request [#2357](https://github.com/mochajs/mocha/issues/2357) from simov/support-inspect
    Support for the --inspect flag
  * Merge pull request [#2181](https://github.com/mochajs/mocha/issues/2181) from JustATrick/fix-check-leaks
    fix check-leaks to catch a leak whose name begins with 'd'
  * lints more files; add more files to lint check; closes [#2457](https://github.com/mochajs/mocha/issues/2457)
  * adds *.orig to .gitignore