chore(package): update @types/sinon to version 5.0.3

Closes #31

Author: greenkeeper[bot]

package.json

@@ -38,7 +38,7 @@
     "@types/http-errors": "^1.6.1",
     "@types/jest": "^22.2.2",
     "@types/node": "^10.0.3",
-    "@types/sinon": "^4.3.0",
+    "@types/sinon": "^5.0.3",
     "jest": "^22.4.3",
     "sinon": "^4.5.0",
     "standard-version": "^4.3.0",