make release-plan do pre-releases for now

Author: mansona

package.json

@@ -109,7 +109,7 @@
     "prettier": "^2.3.2",
     "qunit": "^2.16.0",
     "qunit-dom": "^1.6.0",
-    "release-plan": "^0.9.0",
+    "release-plan": "github:embroider-build/release-plan#allow-configurable-impact-levels",
     "webpack": "^5.95.0"
   },
   "packageManager": "[email protected]+sha512.22721b3a11f81661ae1ec68ce1a7b879425a1ca5b991c975b074ac220b187ce56c708fe5db69f4c962c989452eee76c82877f4ee80f474cebd61ee13461b6228",
@@ -123,5 +123,12 @@
     "versionCompatibility": {
       "ember": ">=3.20.0 < 4.0.0"
     }
+  },
+  "release-plan": {
+    "semverIncrementAs": {
+      "major": "prerelease",
+      "minor": "prerelease",
+      "patch": "prerelease"
+    }
   }
 }