Add "bash-progcomp" from "https://github.com/gaelicWizard/bash-progcomp@v2.0.1"

git-vendor-name: bash-progcomp
git-vendor-dir: vendor/github.com/gaelicWizard/bash-progcomp
git-vendor-repository: https://github.com/gaelicWizard/bash-progcomp
git-vendor-ref: v2.0.1

completion/available/defaults.completion.bash

@@ -0,0 +1,5 @@
+# shellcheck shell=bash
+
+if test -s "${BASH_IT?}/vendor/github.com/gaelicWizard/bash-progcomp/defaults.completion.bash"; then
+	source "$_"
+fi