Bump portfinder from 1.0.19 to 1.0.20 (#8298)
Bump portfinder from 1.0.19 to 1.0.20 (#8298)

Bumps [portfinder](https://github.com/indexzero/node-portfinder) from 1.0.19 to 1.0.20.
- [Release notes](https://github.com/indexzero/node-portfinder/releases)
- [Commits](https://github.com/indexzero/node-portfinder/commits/v1.0.20)

Signed-off-by: dependabot[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@dependabot.com>
jgwhite/ember-cli,fpauser/ember-cli,raycohen/ember-cli,kategengler/ember-cli,balinterdi/ember-cli,kategengler/ember-cli,raycohen/ember-cli,elwayman02/ember-cli,Turbo87/ember-cli,HeroicEric/ember-cli,mike-north/ember-cli,Turbo87/ember-cli,fpauser/ember-cli,ember-cli/ember-cli,HeroicEric/ember-cli,buschtoens/ember-cli,HeroicEric/ember-cli,Turbo87/ember-cli,thoov/ember-cli,Turbo87/ember-cli,thoov/ember-cli,balinterdi/ember-cli,ember-cli/ember-cli,jgwhite/ember-cli,asakusuma/ember-cli,fpauser/ember-cli,thoov/ember-cli,jrjohnson/ember-cli,jrjohnson/ember-cli,jgwhite/ember-cli,thoov/ember-cli,mike-north/ember-cli,ember-cli/ember-cli,mike-north/ember-cli,mike-north/ember-cli,jgwhite/ember-cli,HeroicEric/ember-cli,asakusuma/ember-cli,buschtoens/ember-cli,fpauser/ember-cli,elwayman02/ember-cli