chore: Add changelog using standard-changelog

[machour]

Description

Reopening #504 using an automated tool, let's do this overdue changelog thing! 🎉

[coveralls]

Coverage remained the same at 43.31% when pulling 88deb17 on machour:add-changelog into 608818e on gitpoint:master.

[machour]

Here's how the ChangeLog looks for now: https://gist.github.com/machour/6a6e41ec696a198021fb613f10e58a02

I generated it using ./node_modules/.bin/standard-changelog --first-release then edited the result according to my archeologic researches made in #504.

Still need to :

• Polish the generated file
• Add the links for < 1.3.0
• Wait for a few PRs to get merged and sync the file to see how it goes
• Document the proper workflow for releases (I think we need to git tag && git push --tags before re-generating the file)

[housseindjirdeh]

Amazing - how does the library work? Do we need to re-run the command everytime a commit is merged?

[machour]

I'm still unclear about the workflow, but I think this would have to be ran once per release.

[machour]

Pfiou, time flies :)
Closing this irrelevant PR.