chore(package): update @types/sinon to version 7.0.3

Closes #98

Author: greenkeeper[bot]

Diff for: package.json

@@ -48,7 +48,7 @@
     "@types/debug": "0.0.31",
     "@types/lolex": "^2.1.2",
     "@types/mocha": "^5.2.5",
-    "@types/sinon": "^5.0.1",
+    "@types/sinon": "^7.0.3",
     "benchmark": "^2.1.4",
     "chai": "^4.1.2",
     "chai-as-promised": "^7.1.1",