Merge pull request #12490 from DefinitelyTyped/sinon

Sinon is globally available by a lowercase `sinon` variable, not `Sinon`

sinon-as-promised/sinon-as-promised-tests.ts

@@ -1,11 +1,11 @@
 /// <reference types="sinon"/>
 
 function testResolve() {
-    Sinon.stub().resolves('test val');
+    sinon.stub().resolves('test val');
 }
 
 function testReject() {
-    Sinon.stub().rejects('test val');
+    sinon.stub().rejects('test val');
 }
 
 testResolve();

sinon/index.d.ts

@@ -437,4 +437,4 @@ declare namespace Sinon {
 declare var Sinon: Sinon.SinonStatic;
 
 export = Sinon;
-export as namespace Sinon;
+export as namespace sinon;