Add npm test command

[denis-sokolov]

It's a good common courtesy to allow people to git clone; npm install; npm test without trying to guess how repo internals are set up.

[coveralls]

Coverage remained the same when pulling cfa4cc1 on denis-sokolov:test-script into 96a65ba on jonschlinkert:dev.

[coveralls]

Coverage remained the same when pulling cfa4cc1 on denis-sokolov:test-script into 96a65ba on jonschlinkert:dev.

[puzrin]

It's only partial solution. Is it urgent? We not yet started polishing for "regular users". Probably all make targets need to be replaced with gulp and so on.

[denis-sokolov]

There's nothing wrong with make per se.

The only one make target you have that common contributors may be interested in is, well, the test runner. You want your contributors to not need to worry how to run your tests, because their interest may quickly pass.

Adding this is safe and compatible, and if you change your task runner later, you'll change the package.json as well.

[puzrin]

Ok. Nobody suggested me such things before in other projects, but if you think that it helps - no prob.

Thanks.