Update karma

To fix a bunch of vulns in the many packages it depends on

package.json

@@ -123,16 +123,16 @@
     "expect": "^1.16.0",
     "flow-parser": "^0.57.3",
     "json-loader": "^0.5.3",
-    "karma": "^1.7.0",
+    "karma": "^3.0.0",
     "karma-chrome-launcher": "^0.2.3",
     "karma-cli": "^0.1.2",
-    "karma-junit-reporter": "^0.4.1",
+    "karma-junit-reporter": "^1.2.0",
     "karma-logcapture-reporter": "0.0.1",
     "karma-mocha": "^0.2.2",
     "karma-sourcemap-loader": "^0.3.7",
     "karma-spec-reporter": "^0.0.31",
     "karma-summary-reporter": "^1.3.3",
-    "karma-webpack": "^1.7.0",
+    "karma-webpack": "^3.0.5",
     "matrix-mock-request": "^1.2.1",
     "matrix-react-test-utils": "^0.1.1",
     "mocha": "^5.0.5",