chore(gitignore)

[eruan]

asterisk is necessary

[clydin]

It would be cleaner if you reverted your previous PR #3734.
You can do this fairly easily from GitHub. Click on the link for the previous PR then scroll to the bottom and click "Revert". It will setup a new PR with the appropriate changes.

[beeman]

@eruan please refer to this issue about the usages of cnpm: #3886 .

This functionality should not be added through a PR that is about gitignore as it are 2 different things.

[hansl]

Fixed by #4083 already.

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