Improvements in collection storage. Breaks compatibility with previous versions!

src/database/lock.ts

@@ -3,6 +3,10 @@ export type Release = { release: () => void };
 export default class DocumentLock {
    private locks = new Map<string, (() => void)[]>();
 
+   getLocks() {
+      return Array.from(this.locks.keys())
+   }
+
    async lock(collection: string = "", document: string = "") {
       let key = collection + "/" + document;
       let l = this.locks.get(key);