Remove http-server & npm update

We no longer use it since moving to webpack. It's also
unmaintained and causes dependabot warnings, so get rid of it

package.json

@@ -14,7 +14,6 @@
     "copy-webpack-plugin": "^6.3.2",
     "electron-packager": "^15.0.0",
     "html-webpack-plugin": "^4.5.0",
-    "http-server": "^0.12.3",
     "jasmine-core": "^3.6.0",
     "jshint": "^2.11.1",
     "karma": "^5.1.0",