chore: do not run CI on draft status PRs

.github/workflows/CI.yml

@@ -5,6 +5,7 @@ on:
       - main
     tags: ['*']
   pull_request:
+    types: [review_requested, ready_for_review]
   workflow_dispatch:
 concurrency:
   # Skip intermediate builds: always.
@@ -14,6 +15,7 @@ concurrency:
 jobs:
   test:
     name: Julia ${{ matrix.version }} - ${{ matrix.os }} - ${{ matrix.arch }} - ${{ github.event_name }}
+    if: github.event.pull_request.draft == false
     runs-on: ${{ matrix.os }}
     timeout-minutes: 60
     permissions: # needed to allow julia-actions/cache to proactively delete old caches that it has created