build(deps): update @wmfs/pg-model requirement from 1.8.0 to 1.9.0

Updates the requirements on [@wmfs/pg-model](https://github.com/wmfs/pg-model) to permit the latest version.
- [Release notes](https://github.com/wmfs/pg-model/releases)
- [Changelog](https://github.com/wmfs/pg-model/blob/master/CHANGELOG.md)
- [Commits](https://github.com/wmfs/pg-model/commits/v1.9.0)

Signed-off-by: dependabot[bot] <support@dependabot.com>

package.json

@@ -30,7 +30,7 @@
     "@wmfs/pg-delta-file": "1.14.0",
     "@wmfs/pg-diff-sync": "1.6.0",
     "@wmfs/pg-info": "1.7.0",
-    "@wmfs/pg-model": "1.8.0",
+    "@wmfs/pg-model": "1.9.0",
     "@wmfs/pg-telepods": "1.21.0",
     "@wmfs/relationize": "1.8.0",
     "@wmfs/supercopy": "1.8.0"