Make the spec draft updater remove completed specs and work around nulls

And update dist, which was overlooked. These changes together will allow
the workflow to send PRs that pass the CI.

Author: foolip

.github/workflows/update_draft_features_weekly.yml

@@ -16,7 +16,9 @@ jobs:
           node-version-file: .node-version
           cache: npm
       - run: npm ci
+      - run: rm features/draft/spec/*.yml features/draft/spec/*.dist
       - run: npm run update-drafts
+      - run: npm run dist
       - name: Commit changes
         run: |
           git config --local user.email "[email protected]"

scripts/update-drafts.ts

@@ -70,6 +70,13 @@ async function main() {
       continue;
     }
 
+    // A few null values remain in BCD. They are being removed in
+    // https://github.com/mdn/browser-compat-data/pull/23774.
+    // TODO: Remove this workaround when BCD is free or true/null values.
+    if (feature.id.startsWith('html.manifest.')) {
+      continue;
+    }
+
     const spec_url = feature.data.__compat.spec_url;
     if (!spec_url) {
       continue;