chore(package): update sinon to version 8.0.1

Closes #248

Author: greenkeeper[bot]

package.json

@@ -22,7 +22,7 @@
   "devDependencies": {
     "jest": "^23.5.0",
     "semantic-release": "^15.0.3",
-    "sinon": "^7.2.3",
+    "sinon": "^8.0.1",
     "standard": "^11.0.1"
   },
   "engines": {