feat(package): Adds facade to export.

Author: ryasmi

src/index.ts

@@ -1,9 +1,12 @@
 import * as errors from './errors';
+import FacadeInterface from './Facade';
 import * as signatures from './signatures';
 import * as tests from './tests';
 import * as types from './types';
 import * as utils from './utils';
 
+export type Facade<Id, Entity> = FacadeInterface<Id, Entity>;
+
 export default {
   errors,
   signatures,