Drop support for Node.js < 4

[realityking]

Complimentary to fsevents/fsevents#212, I think it's time to drop Node.js < 4.

The chokidar dependency upath has already dropped support Node.js < 4, this is currently causing CI to fail on 0.10 and 0.12. See these logs for an example: https://travis-ci.org/paulmillr/chokidar/jobs/372092794#L819

Note: Currently CI fails for all Node.js versions - but there are more failures on 0.10 and 0.12 than on the newer versions.

Also fsevents has dropped support for 0.12 (with 0.10 still being supported).

[coveralls]

Coverage decreased (-0.0007%) to 98.501% when pulling edc2f06 on realityking:node-4 into 5e75390 on paulmillr:master.

[coveralls]

Coverage decreased (-0.0007%) to 98.501% when pulling edc2f06 on realityking:node-4 into 5e75390 on paulmillr:master.

[coveralls]

Coverage decreased (-0.0007%) to 98.501% when pulling edc2f06 on realityking:node-4 into 5e75390 on paulmillr:master.

[realityking]

@paulmillr Any interest in merging this?

No matter what happens in fsevents/fsevents#212, chokidar is currently broken on 0.10 and 0.12 anyway because upath already requires Node 4. See Travis tests here: https://travis-ci.org/paulmillr/chokidar/jobs/393728441

Between this one and #709 chokidar would also lose a couple of dependencies which is always nice.

[paulmillr]

@realityking upath is devdependency, we need to check if chokidar still runs on v0.12 w/o devdeps

[realityking]

@paulmillr I don't think it's a dev dependency. It's listed as a dependency

chokidar/package.json

Lines 45 to 58 in 1961427

	"dependencies": {
	"anymatch": "^2.0.0",
	"async-each": "^1.0.0",
	"braces": "^2.3.0",
	"glob-parent": "^3.1.0",
	"inherits": "^2.0.1",
	"is-binary-path": "^1.0.0",
	"is-glob": "^4.0.0",
	"lodash.debounce": "^4.0.8",
	"normalize-path": "^2.1.1",
	"path-is-absolute": "^1.0.0",
	"readdirp": "^2.0.0",
	"upath": "^1.0.5"
	}

And it's loaded in index.js

chokidar/index.js

Line 13 in 6e112b9

var upath = require('upath');

[paulmillr]

@realityking the URL you pointed to is related to nyc, not upath. Why do you think upath won't work? https://travis-ci.org/paulmillr/chokidar/jobs/393728441

[realityking]

@paulmillr You're right! I must've misread the build log.

[paulmillr]

live in 3.x branch