chore(package): update tap to version 13.1.5

Closes #40

Author: greenkeeper[bot]

package.json

@@ -30,6 +30,6 @@
     "chai": "^4.0.0",
     "standard": "^10.0.3",
     "standard-version": "^4.0.0",
-    "tap": "^11.0.0"
+    "tap": "^13.1.5"
   }
 }