chore(package): update sinek to version 8.1.0

Closes #34

Author: greenkeeper[bot]

package.json

@@ -42,7 +42,7 @@
         "log4bro": "^3.11.0",
         "mocha": "^6.2.0",
         "mocha-lcov-reporter": "^1.3.0",
-        "sinek": "^7.30.1",
+        "sinek": "^8.1.0",
         "testdouble": "^3.12.4",
         "uuid": "^3.3.3"
     }