fix: update commit msg for when using commitAll

[vidavidorra]

The commit message now shows that all staged files are committed too.

[vidavidorra]

I'm fixing the failures. Just noted the local tests too, so I'll check them and update this!

[vidavidorra]

I've updated this and did now pass local tests. Would an additional test for this be necessary? If so, under which category should this be cli?
Maybe eslint and/or prettier would be useful to force following the code style and prevent issues like missing semicolon. In the future I'll run the local tests before committing!

[coveralls]

Coverage remained the same at 100.0% when pulling 25f71fb on vidavidorra:fix/commit-all-msg into aad6a61 on conventional-changelog:master.

[coveralls]

Coverage remained the same at 100.0% when pulling 25f71fb on vidavidorra:fix/commit-all-msg into aad6a61 on conventional-changelog:master.

[coveralls]

Coverage remained the same at 100.0% when pulling 9e434cc on vidavidorra:fix/commit-all-msg into aad6a61 on conventional-changelog:master.

[stevemao]

Would an additional test for this be necessary?

Yes please :)

[vidavidorra]

@stevemao I've added the tests under the cli category. I'm not sure whether that is desired, so if not, let me know where to put them. Both a test for the case without the message and with the message is added. I think these are the minimal tests to verify the behaviour, but if you think other tests are more appropriate, let me know.

  cli
    ...
    ✓ does not display `all staged files` without the --commit-all flag (3501ms)
    ✓ does display `all staged files` when the --commit-all flag is passed (3708ms)
    ...

[stevemao]

LGTM

[bcoe]

@vidavidorra could you share what the full console output ends up looking like? It's hard for me to gauge if it looks pretty, based just on the assertions.

[vidavidorra]

@bcoe The console output now looks like this. Note that I'm executing standard-version twice, see #315 for the release and release:ok scripts.

$ npm run release -- --dry-run             

> [email protected] release /home/jdebruijn/projects/tools
> standard-version --skip.commit --skip.tag "--dry-run"

✔ bumping version in package.json from 0.2.0 to 0.2.1
✔ bumping version in package-lock.json from 0.2.0 to 0.2.1
✔ Running lifecycle script "postbump"
ℹ - execute command: "npm run prettier:package"
✔ outputting changes to CHANGELOG.md

---
<a name="0.2.1"></a>
## [0.2.1](https://github.com/vidavidorra/tools/compare/v0.2.0...v0.2.1) (2019-04-04)


### Bug Fixes

* npm moderatte severity vulnerabilities ([0ae5d02](https://github.com/vidavidorra/tools/commit/0ae5d02))
---

✔ Running lifecycle script "postchangelog"
ℹ - execute command: "npm run prettier:changelog"

$ npm run release:ok -- --dry-run

> [email protected] release:ok /home/jdebruijn/projects/tools
> standard-version --sign --commit-all --skip.bump --skip.changelog "--dry-run"

✔ Running lifecycle script "precommit"
ℹ - execute command: "git add CHANGELOG.md package*.json"
✔ committing CHANGELOG.md and all staged files
✔ tagging release v0.2.0
ℹ Run `git push --follow-tags origin master && npm publish` to publish