build: Upgrade sinon package.

This also removes PhantomJS as a test environment.

This is part of #1132.

docs/developers.rst

@@ -35,10 +35,10 @@ information is submitted to `codecov <https://codecov.io/github/OpenGeoscience/g
 Headless browser testing
 ------------------------
 
-Geojs uses `PhantomJS <http://phantomjs.org/>`_ for headless browser
-testing of core utilities.  Unfortunately because PhantomJS does not
-support webgl at this time, so code paths requiring webgl must be either
-mocked or run in an environment such as xvfb.
+Geojs uses headless Chrome and Firefox for headless browser testing of core
+utilities.  If the headless mode does not support webgl at this time, code
+paths requiring webgl must be either mocked or run in an environment such as
+xvfb.
 
 The headless unit tests should be placed in the ``tests/cases/``
 directory.  All javascript files in this directory will be detected

karma-base.js

@@ -262,7 +262,7 @@ module.exports = function (config) {
       '/built/': '/base/dist/built/'
     },
     browsers: [
-      'PhantomJS'
+      'ChromeHeadlessTouch'
     ],
     customLaunchers: {
       ChromeHeadlessTouch: {

karma-cov.conf.js

@@ -5,8 +5,8 @@
  * Return URL friendly browser string
  */
 function browser(b) {
-  /* The browser string starts with the basic browser name (Firefox, PhantomJS,
-   * etc.  Split on the first space or dash to isolate this name. */
+  /* The browser string starts with the basic browser name (Firefox, Chrome,
+   * etc.).  Split on the first space or dash to isolate this name. */
   return b.toLowerCase().split(/[ /-]/)[0];
 }