type: Fix index.d.ts deleteScope declaration, fix README deleteScope (#362)

README.md

@@ -262,6 +262,11 @@ Use the `hotkeys.deleteScope` method to delete a scope. This will also remove al
 ```js
 hotkeys.deleteScope('issues');
 ```
+You can use second argument, if need set new scope after deleting.
+
+```js
+hotkeys.deleteScope('issues', 'newScopeName');
+```
 
 ### unbind
 

index.d.ts

@@ -37,7 +37,7 @@ interface Hotkeys {
 
   setScope(scopeName: string): void;
   getScope(): string;
-  deleteScope(scopeName: string): void;
+  deleteScope(scopeName: string, newScopeName?: string): void;
 
   noConflict(): Hotkeys;