Live sync Attributes (#553)

* Add test project for tags

* Update rbx_dom_lua and add attributes project

* Add Attributes shorthand; not working

* Update dependencies

* Update rbx_reflection_database

* Update rbx_types and commit attributes snapshot

test-projects/attributes/default.project.json

@@ -0,0 +1,16 @@
+{
+  "name": "attributes",
+  "tree": {
+    "$className": "DataModel",
+    "Workspace": {
+      "Folder": {
+        "$className": "Folder",
+        "$properties": {
+          "Attributes": {
+            "Hello": { "Vector3": [1, 2, 3] }
+          }
+        }
+      }
+    }
+  }
+}