fix(core): update

ts/index.ts

@@ -1,3 +1,5 @@
 export * from './smartdata.classes.db';
 export * from './smartdata.classes.collection';
 export * from './smartdata.classes.doc';
+
+export { IMongoDescriptor } from './interfaces';

ts/interfaces/index.ts

@@ -0,0 +1 @@
+export * from './mongodescriptor';

ts/interfaces/mongodescriptor.ts

@@ -0,0 +1,5 @@
+export interface IMongoDescriptor {
+  connectionUrl: string;
+  password: string;
+  database: string;
+}