remove phantomjs

package.json

@@ -322,7 +322,7 @@
     "browserify": "^14.4.0",
     "buffer": "^4.9.1",
     "coffee-script": "^1.10.0",
-    "coveralls": "^2.11.15",
+    "coveralls": "^2.13.2",
     "cross-spawn": "^5.1.0",
     "eslint": "^4.7.2",
     "eslint-config-semistandard": "^11.0.0",
@@ -343,7 +343,6 @@
     "karma-spec-reporter": "0.0.31",
     "nyc": "^11.2.1",
     "os-name": "^2.0.1",
-    "phantomjs": "1.9.8",
     "readable-stream": "2.2.11",
     "rimraf": "^2.5.2",
     "should": "^13.1.0",