dependencies: bump gulp to v4

To fix the same error as here nodejs/node#20285 Task changes as described at https://fettblog.eu/gulp-4-parallel-and-series/ Change-type: patch Signed-off-by: Gergely Imreh <gergely@balena.io>
balena-io · May 2, 2019 · e0ee1bb · e0ee1bb
1 parent aad677a
commit e0ee1bb
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diff --git a/gulpfile.coffee b/gulpfile.coffee
@@ -31,10 +31,10 @@ gulp.task 'test', ->
 			reporter: 'spec'
 		}))
 
-gulp.task 'build', [
+gulp.task 'build', gulp.series [
 	'coffee',
 	'pages'
 ]
 
-gulp.task 'watch', [ 'build' ], ->
+gulp.task 'watch', gulp.series [ 'build' ], ->
 	gulp.watch([ OPTIONS.files.coffee ], [ 'build' ])
diff --git a/package.json b/package.json
@@ -85,7 +85,7 @@
     "ent": "^2.2.0",
     "filehound": "^1.16.2",
     "fs-extra": "^5.0.0",
-    "gulp": "^3.9.0",
+    "gulp": "^4.0.1",
     "gulp-coffee": "^2.2.0",
     "gulp-inline-source": "^2.1.0",
     "gulp-mocha": "^2.0.0",