build: use nyc for test coverage

.gitignore

@@ -1,3 +1,4 @@
+.nyc_output/
 coverage/
 node_modules/
 npm-debug.log

.travis.yml

@@ -23,9 +23,8 @@ before_install:
   - "test ! -d node_modules || npm prune"
   - "test ! -d node_modules || npm rebuild"
 script:
-  # Run test script, depending on istanbul install
-  - "test ! -z $(npm -ps ls istanbul) || npm test"
-  - "test   -z $(npm -ps ls istanbul) || npm run-script test-travis"
+  # Run test script, then lint depending on eslint install
+  - "npm run-script test-travis"
   - "test   -z $(npm -ps ls eslint) || npm run-script lint"
 after_script:
-  - "test -e ./coverage/lcov.info && npm install coveralls@2 && cat ./coverage/lcov.info | coveralls"
+  - "test -d .nyc_output && npm install coveralls@2 && nyc report --reporter=text-lcov | coveralls"

package.json

@@ -22,8 +22,8 @@
     "eslint": "3.19.0",
     "eslint-plugin-markdown": "1.0.0-beta.6",
     "finalhandler": "1.0.6",
-    "istanbul": "0.4.5",
     "mocha": "3.5.3",
+    "nyc": "10.3.2",
     "supertest": "1.2.0"
   },
   "files": [
@@ -39,7 +39,7 @@
   "scripts": {
     "lint": "eslint --plugin markdown --ext js,md .",
     "test": "mocha --reporter spec --bail --check-leaks test/",
-    "test-cov": "istanbul cover node_modules/mocha/bin/_mocha -- --reporter dot --check-leaks test/",
-    "test-travis": "istanbul cover node_modules/mocha/bin/_mocha --report lcovonly -- --reporter spec --check-leaks test/"
+    "test-cov": "nyc --reporter=text npm test",
+    "test-travis": "nyc --reporter=html --reporter=text npm test"
   }
 }