Upgrade the build environment

[fstirlitz]

This project has hardly been very keen at keeping up with the Kardashians latest developments in the JavaScript world. As a result, the testsuite has experienced some failures as of late. In particular, the spec repository referred to on the depencency list has disappeared from GitHub; as a stop-gap measure, I switched to version 1.0.1 from npmjs.

An overhaul of the build process is probably long overdue. Suggestions are welcome on how to replace deprecated packages without breaking everything and rewriting the project from scratch.

[oxyc]

If we drop support of all the obscure environments and runtimes it wouldn't be that be many manually written tests that need that need to be changed if we switched to whatever library. Most of the tests are scaffolded anyways

[teoxoy]

Looks like #72 is failing because PhantomJS doesn't support ES6...
Can we drop support for PhantomJS? It's no longer maintained.

[fstirlitz]

I think I will drop PhantomJS… and replace it with duktape. It may take some time to set it up under Travis CI, however, so I won't be doing it right away.

[fstirlitz]

The more important issue is what to do with spec, however. It is still available from npm and still works, but I don't think it's wise to rely on an unmaintained dependency that may disappear any time soon.

[teoxoy]

You could switch spec for jest or mocha

[fstirlitz]

I upgraded some build dependencies and as of 626f3e4 I managed to shut up npm audit at least. That has to count for something. The issue is still unresolved, though.