[fix] Upgrade build to gulp v4, and @ionic-cli/v1-toolkit v2.0.18

 -> waiting the PR https://github.com/ionic-team/ionic-cli/pull/4264 to merge to master
1 job for gulp_v4
latest
Status Job ID Name Coverage
  Alt Build
skipped #32853
doppler-docker allowed to fail
docker-for-fast-build