add tap-spec to package.json and test script to "prettify" test output see: https://github.com/dwyl/learn-tape

Author: nelsonic

Diff for: package.json

@@ -19,14 +19,15 @@
     "pre-commit": "^1.2.2",
     "qunit-tap": "^1.5.1",
     "qunitjs": "^2.3.2",
+    "tap-spec": "^5.0.0",
     "tape": "^4.9.1"
   },
   "scripts": {
     "check-coverage": "istanbul check-coverage --statements 100 --functions 100 --lines 100 --branches 100",
     "postinstall": "npm test",
     "retest": "PORT=8000 node_modules/.bin/nodemon ./test/*.js",
     "start": "live-server --port=8000 --open=./examples",
-    "test": "istanbul cover tape ./test/*.test.js"
+    "test": "istanbul cover tape ./test/*.test.js | tap-spec"
   },
   "keywords": [
     "Elm",