[Build] Specify phantomjs-prebuilt version

Attempting to resolve build failure
https://circleci.com/gh/nasa/openmct/3167

Author: VWoeltjen

package.json

@@ -40,7 +40,7 @@
     "mkdirp": "^0.5.1",
     "moment": "^2.11.1",
     "node-bourbon": "^4.2.3",
-    "phantomjs-prebuilt": "2.1.11 || >2.1.12 <3.0.0",
+    "phantomjs-prebuilt": "2.1.11",
     "requirejs": "2.1.x",
     "split": "^1.0.0"
   },