Update dependencies for MSC4157

Namely, update the widget-sdk to avoid seeing a permissions dialog when
opening the Element Call widget.

package.json

@@ -84,7 +84,7 @@
         "lodash": "^4.17.21",
         "matrix-js-sdk": "github:matrix-org/matrix-js-sdk#develop",
         "matrix-react-sdk": "github:matrix-org/matrix-react-sdk#develop",
-        "matrix-widget-api": "^1.3.1",
+        "matrix-widget-api": "^1.8.2",
         "react": "17.0.2",
         "react-dom": "17.0.2",
         "ua-parser-js": "^1.0.0"