Update esprima to version 3.1.3

[alicoding]

I have to fix this broken test test/fixtures/use-strict-without-semicolon.js
Since using use strict it was throwing an error when parsing the code about
missing semicolon here

closes #21

[alicoding]

I also added package-lock.json which is part of npm@5

[alicoding]

I also added a test here :)

[thlorenz]

Hi, thanks for the work I will review when I get a chance. In the meantime please remove all unrelated changes:

• lots of whitespace changes (please undo)
• package-lock.json is not necessary for this change, please remove

Also please stick to the range scheme I'm using for dependencies in the package.json, i.e. don't use ^, but ~ instead.

Thanks

[alicoding]

Done :)

[thlorenz]

Many thanks :)

I merged and published as 1.0. I'd love to see some docs regarding the moveStrictWanted feature you added.
Please when you have some time add that.

I also made you collaborator.

So in the future you can merge changes to master after we agree on a PR, following this guide.
I will then version and publish to npm.

Thanks.

[alicoding]

Actually, I did not add that feature, but I don't mind adding documentation for that :) and thanks!

[thlorenz]

Ah ok, got confused since there were some changes around there ...
But yeah any help here would be greatly appreciated :)