Ionic-cli: use gulp#4

[rolandjitsu]

I was just trying to use gulp 4 instead of 3 in the gulpfile the ionic start command generates, but it looks like your CLI is dependent on version 3 and it cannot find some tasks.

Note that using v4 you get the advantage of dropping some deps, such as run-sequence, since v4 already provides a way to run things in series or parallel.

I get:

TypeError: Cannot read property 'serve:before' of undefined
    at Object.runWithGulp (/Users/rolandjitsu/Projects/infarm/operator/node_modules/ionic/lib/cli.js:217:17)
    at Object.run (/Users/rolandjitsu/Projects/infarm/operator/node_modules/ionic/lib/cli.js:190:16)
    at Object.<anonymous> (/Users/rolandjitsu/Projects/infarm/operator/node_modules/ionic/bin/ionic:13:10)
    at Module._compile (module.js:541:32)
    at Object.Module._extensions..js (module.js:550:10)
    at Module.load (module.js:458:32)
    at tryModuleLoad (module.js:417:12)
    at Function.Module._load (module.js:409:3)
    at Module.runMain (module.js:575:10)
    at run (bootstrap_node.js:352:7)

I could submit a pr if this would be an option, should be a straight forward migration.

[loki1]

+1

[armenbadalyan]

+1

[martinmine]

+1

[brunodeprez]

+1

[rolandjitsu]

I'm closing this as Ionic no longer uses Gulp, there is ionic-app-scripts as replacement.