remove istanbul

Author: Qix-

package.json

@@ -26,7 +26,7 @@
   "scripts": {
     "lint": "xo",
     "test": "npm run test:node && npm run test:browser && npm run lint",
-    "test:node": "istanbul cover _mocha -- test.js test.node.js",
+    "test:node": "mocha test.js test.node.js",
     "test:browser": "karma start --single-run",
     "test:coverage": "cat ./coverage/lcov.info | coveralls"
   },
@@ -37,7 +37,6 @@
     "brfs": "^2.0.1",
     "browserify": "^16.2.3",
     "coveralls": "^3.0.2",
-    "istanbul": "^0.4.5",
     "karma": "^3.1.4",
     "karma-browserify": "^6.0.0",
     "karma-chrome-launcher": "^2.2.0",