Update dependencies

.mocharc.json

@@ -0,0 +1,3 @@
+{
+  "exit": true
+}

package.json

@@ -20,7 +20,7 @@
   "repository": "jsdom/jsdom",
   "dependencies": {
     "abab": "^2.0.0",
-    "acorn": "^6.1.1",
+    "acorn": "^7.1.0",
     "acorn-globals": "^4.3.2",
     "array-equal": "^1.0.0",
     "cssom": "^0.4.1",
@@ -58,27 +58,27 @@
     }
   },
   "devDependencies": {
-    "benchmark": "1.0.0",
+    "benchmark": "^2.1.4",
     "browserify": "^16.2.3",
     "chai": "^4.2.0",
     "eslint": "^6.1.0",
     "eslint-find-rules": "^3.3.1",
     "eslint-plugin-html": "^6.0.0",
     "eslint-plugin-jsdom-internal": "link:./scripts/eslint-plugin",
     "js-yaml": "^3.13.1",
-    "karma": "^1.7.1",
-    "karma-browserify": "^5.3.0",
-    "karma-chrome-launcher": "^2.2.0",
+    "karma": "^4.3.0",
+    "karma-browserify": "^6.1.0",
+    "karma-chrome-launcher": "^3.1.0",
     "karma-mocha": "^1.3.0",
     "karma-mocha-webworker": "^1.3.0",
-    "karma-sauce-launcher": "^1.2.0",
+    "karma-sauce-launcher": "^2.0.2",
     "minimatch": "^3.0.4",
-    "mocha": "^3.5.2",
+    "mocha": "^6.2.0",
     "mocha-sugar-free": "^1.4.0",
     "optimist": "0.6.1",
     "portfinder": "^1.0.20",
     "q": "^1.5.1",
-    "rimraf": "^2.6.3",
+    "rimraf": "^3.0.0",
     "server-destroy": "^1.0.1",
     "st": "^1.2.2",
     "watchify": "^3.11.1",