coverage: Use nyc to be able to get the reports locally

.gitignore

@@ -1,4 +1,6 @@
 node_modules/
 package-lock.json
 .idea/
-docs/
+docs/
+.nyc_output
+coverage

.npmignore

@@ -2,4 +2,6 @@ tests/
 .travis.yml
 .idea/
 docs/
-.esdoc.json
+.esdoc.json
+.nyc_output
+coverage

.travis.yml

@@ -8,5 +8,5 @@ node_js:
 jobs:
   include:
     - stage: Produce Coverage
-      node_js: node
-      script: npm install coveralls istanbul mocha-lcov-reporter && istanbul cover ./node_modules/mocha/bin/_mocha --report lcovonly -- -R spec tests && cat ./coverage/lcov.info | ./node_modules/coveralls/bin/coveralls.js && rm -rf ./coverage
+      node_js: "11"
+      script: npm run coverage && npm run coveralls

package.json

@@ -4,15 +4,19 @@
   "description": "A bucket of code to make NodeJS easier",
   "main": "index.js",
   "scripts": {
-    "test": "mocha tests --recursive"
+    "test": "mocha tests --recursive",
+    "coverage": "nyc --reporter=html --reporter=text mocha tests --recursive",
+    "coveralls": "nyc report --reporter=text-lcov | coveralls"
   },
   "author": "Mark Eschbach <meschbach@gmail.com>",
   "license": "MIT",
   "devDependencies": {
     "chai": "4",
     "chai-string": "1",
+    "coveralls": "3.0.3",
     "express": ">=4.16.0",
-    "mocha": "6"
+    "mocha": "6",
+    "nyc": "14.0.0"
   },
   "repository": "meschbach/js-junk-bucket"
 }