add code coverage reporting (cov 40%)

Author: juliangruber

.gitignore

@@ -1 +1,2 @@
 node_modules
+.nyc_output

package.json

@@ -1,13 +1,14 @@
 {
   "scripts": {
     "start": "nodemon bin/update-server.js",
-    "test": "prettier-standard '**/*.js' && standard && tap test/*.js"
+    "test": "prettier-standard '**/*.js' && standard && nyc tap test/*.js"
   },
   "dependencies": {
     "node-fetch": "^2.1.1"
   },
   "devDependencies": {
     "nodemon": "^1.17.1",
+    "nyc": "^11.6.0",
     "prettier-standard": "^8.0.0",
     "standard": "^11.0.0",
     "tap": "^11.1.2"