3 fixes

[Thomas-git]

Hi,

Here are 3 fixes :

• one big dependencies update to fix a bunch of security warnings (I do not have chrome to run the test suite, but everything works for me)
• entry for browserify in package.json, so one can use timeline-plus in a browserify project
• better handling of locale date strings

Tell me if I done something wrong.

[yotamberk]

Hey @Thomas-git , I've moved to https://github.com/visjs/vis-timeline.
Would you be able to transfer this PR to there?

[jdehaan]

Could you please update the repos title here at least in order to know which is currently the most up to date repos. I found 3 different ones, this one, the visjs org one and another one in visjs-community... #156

[jarnovanrhijn]

@yotamberk, what is the current state of this project? is this gonna be maintaned or is it one of the other?

[yotamberk]

I've moved officially to https://github.com/visjs/vis-timeline
I maintain only that repo now. Once V6 in vis-timeline will be published (this weekend), I will archive this repo so no more confusion is remained.