v4.0.0
Docs: Update recipes to install gulp@next
Docs: Integrate pump documentation from gulp-uglify (closes #1791)
Docs: Remove references to gulp-util
Docs: Add options.cwd for gulp.src API (#1645)
Docs: Add example of -T/--tasks and --tasks-simple
Docs: Replace irc with gitter channel
Docs: Add link to "Upgrading to Gulp 4" article