ora: promise method should belong to oraFactory, not Ora class.

types/ora/index.d.ts

@@ -3,6 +3,7 @@
 // Definitions by: Basarat Ali Syed <https://github.com/basarat>
 //                 Christian Rackerseder <https://github.com/screendriver>
 //                 BendingBender <https://github.com/BendingBender>
+//                 Aleh Zasypkin <https://github.com/azasypkin>
 // Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
 
 /// <reference types="node" />
@@ -118,14 +119,14 @@ declare class Ora {
     text: string;
 
     color: Color;
-
-    promise(action: PromiseLike<any>, options?: Options | string): Ora;
 }
 
 interface oraFactory {
     (options?: Options | string): Ora;
 
     new (options?: Options | string): Ora;
+
+    promise(action: PromiseLike<any>, options?: Options | string): Ora;
 }
 
 declare const ora: oraFactory;

types/ora/ora-tests.ts

@@ -41,7 +41,7 @@ spinner.stopAndPersist({text: 'all done'});
 spinner.stopAndPersist({symbol: '@', text: 'all done'});
 
 const resolves = Promise.resolve(1);
-spinner.promise(resolves, {
+Ora.promise(resolves, {
     stream: new PassThrough(),
     text: 'foo',
     color: 'blue',