chore(package): update tap to version 13.1.8

Closes #24

Author: greenkeeper[bot]

package.json

@@ -33,7 +33,7 @@
     "pre-commit": "^1.2.2",
     "snazzy": "^8.0.0",
     "standard": "^12.0.1",
-    "tap": "^12.1.0"
+    "tap": "^13.1.8"
   },
   "dependencies": {
     "abstract-cache": "^1.0.1",