makeDocumentProjection ref count 1, then 0, then 1 bug fix while doc handle still in memory (lost reactivity on mount, unmount, then remount)

Author: clinuxrulz

src/makeDocumentProjection.ts

@@ -40,6 +40,7 @@ export default function makeDocumentProjection<T>(handle: DocHandle<T>) {
 		cleanup() {
 			handle.off("change", patch)
 			handle.off("delete", ondelete)
+			cache.delete(handle)
 		},
 	})