add NYC html output

Author: mchangrh

.gitignore

@@ -47,4 +47,5 @@ working
 /dist/
 
 # nyc coverage output
-.nyc_output/
+.nyc_output/
+coverage/

package.json

@@ -5,7 +5,9 @@
   "main": "src/index.ts",
   "scripts": {
     "test": "npm run tsc && ts-node test/test.ts",
-    "test:coverage": "nyc npm run test",
+    "cover": "nyc npm run test",
+    "cover:report": "nyc report --reporter=html",
+    "cover:genreport": "nyc npm run test && nyc report --reporter=html",
     "dev": "nodemon",
     "dev:bash": "nodemon -x 'npm test ; npm start'",
     "postgres:docker": "docker run --rm -p 5432:5432 -e POSTGRES_USER=ci_db_user -e POSTGRES_PASSWORD=ci_db_pass postgres:alpine",