Updating client dependancies and ESLint (#2954)

* Updating client dependancies

* Fixing eslint errors with updates

* Updating eslint

webapp/tests/spinner_button.test.jsx

@@ -1,9 +1,3 @@
-/* eslint-disable no-console */
-/* eslint-disable global-require */
-/* eslint-disable func-names */
-/* eslint-disable prefer-arrow-callback */
-/* eslint-disable no-magic-numbers */
-/* eslint-disable no-unreachable */
 
 var jsdom = require('mocha-jsdom');
 var assert = require('assert');
@@ -21,4 +15,4 @@ describe('SpinnerButton', function() {
 
         assert.equal(spinner.props.spinning, false, 'should start in the default false state');
     });
-});
+});