upgrade karma deps

Author: pgoldberg

packages/conjure-client/package.json

@@ -32,12 +32,12 @@
     "express": "^4.16.4",
     "fetch-mock": "^5.13.1",
     "jest": "^24.9.0",
-    "karma": "^2.0.5",
+    "karma": "^6.4.0",
     "karma-chai": "^0.1.0",
-    "karma-chrome-launcher": "^2.2.0",
-    "karma-mocha": "^1.3.0",
+    "karma-chrome-launcher": "^3.1.1",
+    "karma-mocha": "^2.0.1",
     "karma-nodeunit": "^0.2.0",
-    "karma-typescript": "^4.1.1",
+    "karma-typescript": "^5.5.3",
     "mocha": "^5.2.0",
     "node-fetch": "^2.6.0",
     "npm-run-all": "^4.1.5",