update gulp to 4.x

Author: caub

gulpfile.js

@@ -25,44 +25,44 @@ gulp.task('test', function(done) {
     }, done).start();
 });
 
-gulp.task('test-pr', ['copy', 'dist'], function(done) {
-    new karma.Server({
-        configFile: __dirname + '/karma.conf.js',
-        browsers: ['Firefox', 'Chrome_Travis'],
-        singleRun: true
-    }, done).start();
-});
-
-gulp.task('test-ci', ['copy', 'dist'], function(done) {
-    new karma.Server({
-        configFile: __dirname + '/karma.conf.ci.js',
-        singleRun: true
-    }, done).start();
-});
-
 gulp.task('copy', function() {
     gulp.src(sources)
         .pipe(gulp.dest('dist'));
 });
 
-gulp.task('dist', ['copy'], function() {
+gulp.task('dist', gulp.series(['copy'], function() {
     return gulp.src(sources)
         .pipe(sourcemaps.init())
         .pipe(uglify())
         .pipe(rename(minified))
         .pipe(sourcemaps.write('./'))
         .pipe(gulp.dest('dist'));
-});
+}));
+
+gulp.task('test-pr', gulp.series(['copy', 'dist'], function(done) {
+    new karma.Server({
+        configFile: __dirname + '/karma.conf.js',
+        browsers: ['Firefox', 'Chrome_Travis'],
+        singleRun: true
+    }, done).start();
+}));
+
+gulp.task('test-ci', gulp.series(['copy', 'dist'], function(done) {
+    new karma.Server({
+        configFile: __dirname + '/karma.conf.ci.js',
+        singleRun: true
+    }, done).start();
+}));
 
 gulp.task('clean', del.bind(null, ['build', 'coverage', 'dist']));
 
-gulp.task('pr', ['lint', 'test-pr']);
+gulp.task('pr', gulp.series(['lint', 'test-pr']));
 
-gulp.task('ci', ['lint', 'test-ci'], function() {
+gulp.task('ci', gulp.series(['lint', 'test-ci'], function() {
     gulp.src('./coverage/**/lcov.info')
         .pipe(coveralls());
-});
+}));
 
-gulp.task('default', ['clean'], function(cb) {
+gulp.task('default', gulp.series(['clean'], function(cb) {
     runSequence('lint', ['copy', 'dist'], 'test', cb);
-});
+}));