two niceDate tests fail, assuming due to DST difference

[jeffkpayne]

Looks like since both the niceDate function and the test itself are using new Date(string), which uses local time, the tests which include those code paths fail in some timezones (mine, PST).

Have you considered using a library like moment.js? Guessing that could reduce your niceDate function down to a couple lines of code, but not sure if you want that dependency...

This illustrates the problem and possible solution in the node repl:

> new Date('2015-10-03').getDate()
2
> new Date(2015, 9, 3).getDate()
3
> const moment = require('moment');
undefined
> moment('2015-10-03').format('D MMMM YYYY')
'3 October 2015'

Here's the output from node test:

> auto-changelog@1.3.0 test /Users/jpayne/repos/auto-changelog
> cross-env NODE_ENV=test nyc mocha test



  fetchCommits
    ✓ fetches commits

  parseCommits
    ✓ parses commits
    ✓ parses bitbucket commit
    ✓ supports startingCommit option
    ✓ invalid startingCommit throws an error

  getFixes
    ✓ returns null with no fixes
    ✓ parses a single fix
    ✓ parses fix in commit notes
    ✓ parses a commit that closes a pull request
    ✓ parses a commit that closes a bitbucket pull request
    ✓ parses a commit that closes a gitlab pull request
    ✓ parses multiple fixes
    ✓ parses fixes by issue URL
    ✓ parses multiple fixes by issue URL
    ✓ parses external repo issues
    ✓ supports issueUrl parameter
    ✓ supports issuePattern parameter
    ✓ supports issuePattern parameter with capture group

  getMerge
    ✓ returns null on fail
    GitHub
      ✓ parses a merge
      ✓ parses a squash merge
      ✓ parses a squash merge with no message
    GitLab
      ✓ parses a merge
    BitBucket
      ✓ parses a merge

  fetchOrigin
    ✓ parses https://github.com/user/repo
    ✓ parses https://github.com:8080/user/repo
    ✓ parses git@github.com:user/repo.git
    ✓ parses https://gitlab.com/user/repo
    ✓ parses git@gitlab.com:user/repo.git
    ✓ parses https://bitbucket.org/user/repo
    ✓ parses git@bitbucket.org:user/repo.git
    ✓ throws an error

  parseReleases
    ✓ parses releases
    ✓ parses releases with no commit limit
    ✓ parses bitbucket releases
    ✓ supports a version override

  getOptions
    ✓ parses commit limit correctly
    ✓ parses false commit limit correctly

  run
    ✓ generates a changelog
    ✓ uses options from package.json
    ✓ uses version from package.json
    ✓ command line options override options from package.json
    ✓ does not error when using unreleased option
    ✓ does not error when using latest version option
    ✓ throws an error when no package found
    ✓ throws an error when no template found
    ✓ throws an error when given an invalid latest version

  compileTemplate
    ✓ compiles using compact template
    ✓ compiles using keepachangelog template
    ✓ compiles using json template
    ✓ compiles using path to template file
    ✓ throws an error when no template found

  cmd
    ✓ runs a command

  niceDate
    1) formats string into nice date
    2) formats date into nice date

  removeIndentation
    ✓ removes indentation

  isLink
    ✓ returns true for links
    ✓ returns false for non-links


  56 passing (195ms)
  2 failing

  1) niceDate
       formats string into nice date:

      AssertionError: expected '2 October 2015' to equal '3 October 2015'
      + expected - actual

      -2 October 2015
      +3 October 2015

      at Context.<anonymous> (test/utils.js:15:39)

  2) niceDate
       formats date into nice date:

      AssertionError: expected '2 October 2015' to equal '3 October 2015'
      + expected - actual

      -2 October 2015
      +3 October 2015

      at Context.<anonymous> (test/utils.js:21:49)



-------------|----------|----------|----------|----------|----------------|
File         |  % Stmts | % Branch |  % Funcs |  % Lines |Uncovered Lines |
-------------|----------|----------|----------|----------|----------------|
All files    |      100 |       95 |      100 |      100 |                |
 commits.js  |      100 |    92.68 |      100 |      100 |       42,79,80 |
 origin.js   |      100 |    83.33 |      100 |      100 |             11 |
 releases.js |      100 |    96.97 |      100 |      100 |             37 |
 run.js      |      100 |      100 |      100 |      100 |                |
 template.js |      100 |      100 |      100 |      100 |                |
 utils.js    |      100 |      100 |      100 |      100 |                |
-------------|----------|----------|----------|----------|----------------|
npm ERR! Test failed.  See above for more details.

Let me know and I can open a PR.