improvement: sanitization via DOMPurify (#4513)

* swap `sanitize-html` for `dompurify`

* set up node enzyme tests with jsdom

dompurify, as the name suggests, needs a DOM or it won't work!

* reconcile tests and sanitizer settings

* remove obsolete sanitizeOptions

* add `jsdom` dependency

package.json

@@ -31,7 +31,7 @@
     "test": "npm run lint-errors && npm run just-test-in-node",
     "test-in-node": "npm run lint-errors && npm run just-test-in-node",
     "just-test": "karma start --config karma.conf.js",
-    "just-test-in-node": "mocha --recursive --compilers js:babel-core/register test/core test/components test/bugs test/swagger-ui-dist-package test/xss",
+    "just-test-in-node": "mocha --require test/setup.js --recursive --compilers js:babel-core/register test/core test/components test/bugs test/swagger-ui-dist-package test/xss",
     "just-check-coverage": "nyc npm run just-test-in-node",
     "test-e2e": "sleep 3 && nightwatch test/e2e/scenarios/ --config test/e2e/nightwatch.json",
     "e2e-initial-render": "nightwatch test/e2e/scenarios/ --config test/e2e/nightwatch.json --group initial-render",
@@ -48,6 +48,7 @@
     "core-js": "^2.5.1",
     "css.escape": "1.5.1",
     "deep-extend": "0.4.1",
+    "dompurify": "^1.0.4",
     "expect": "1.20.2",
     "getbase": "^2.8.2",
     "ieee754": "^1.1.8",
@@ -80,7 +81,6 @@
     "redux-logger": "*",
     "remarkable": "^1.7.1",
     "reselect": "2.5.3",
-    "sanitize-html": "^1.14.1",
     "scroll-to-element": "^2.0.0",
     "serialize-error": "2.0.0",
     "shallowequal": "0.2.2",
@@ -119,6 +119,7 @@
     "file-loader": "0.11.2",
     "git-describe": "^4.0.1",
     "imports-loader": "0.7.1",
+    "jsdom": "^11.10.0",
     "json-loader": "0.5.4",
     "json-server": "^0.11.0",
     "karma": "^1.7.0",