Fix testing to run on modern systems by using local phantomjs.

Remove phantomjs from package.json.
Add testing instruction.

Author: cryptoquick

DEVELOP.md

@@ -10,6 +10,10 @@ To install dependencies, run
 
     npm install
 
+To install local phantomjs with homebrew on macOS, run
+
+    brew install phantomjs
+
 To build dygraphs, run
 
     npm run build

package.json

@@ -48,10 +48,9 @@
     "jshint": "^2.5.10",
     "lcov-parse": "0.0.9",
     "mocha": "^2.1.0",
-    "mocha-phantomjs": "3.5.3",
+    "mocha-phantomjs": "4.1.0",
     "mocha-phantomjs-istanbul": "0.0.2",
     "parse-data-uri": "^0.2.0",
-    "phantomjs": "^1.9.7-8",
     "pre-commit": "^1.0.6",
     "source-map": "^0.4.2",
     "uglify-js": "^2.5.0",

scripts/run-tests.sh

@@ -20,4 +20,4 @@ trap finish EXIT
 sleep 1
 
 # Start the tests
-mocha-phantomjs http://localhost:8081/auto_tests/runner.html "$@"
+mocha-phantomjs -p $(which phantomjs) http://localhost:8081/auto_tests/runner.html "$@"