Update 3rd party deps and disable XEP-156 to speed up tests

package.json

@@ -60,7 +60,7 @@
     "@babel/plugin-proposal-nullish-coalescing-operator": "^7.8.3",
     "@babel/plugin-proposal-optional-chaining": "^7.9.0",
     "@babel/plugin-syntax-dynamic-import": "^7.2.0",
-    "@babel/preset-env": "^7.9.0",
+    "@babel/preset-env": "^7.9.5",
     "@converse/headless": "file:src/headless",
     "@fortawesome/fontawesome-free": "5.13.0",
     "@lit-element-bootstrap/button": "^1.0.0",
@@ -69,7 +69,7 @@
     "@open-wc/building-webpack": "^2.12.0",
     "autoprefixer": "^9.6.1",
     "babel-eslint": "^10.0.3",
-    "babel-loader": "^8.0.6",
+    "babel-loader": "^8.1.0",
     "bootstrap": "^4.3.1",
     "bootstrap.native": "^2.0.27",
     "bootstrap.native-loader": "2.0.0",
@@ -81,7 +81,7 @@
     "eslint": "^6.3.0",
     "eslint-plugin-lodash": "^5.1.0",
     "exports-loader": "^0.7.0",
-    "fa-icons": "^0.1.9",
+    "fa-icons": "^0.2.0",
     "fast-text-encoding": "^1.0.0",
     "file-loader": "^4.0.0",
     "html-webpack-plugin": "^3.2.0",
@@ -96,7 +96,7 @@
     "mini-css-extract-plugin": "^0.9.0",
     "minimist": "^1.2.3",
     "node-sass": "^4.13.1",
-    "npm": "^6.11.3",
+    "npm": "^6.14.4",
     "po-loader": "^0.5.0",
     "po2json": "^1.0.0-beta",
     "postcss-clean": "^1.1.0",
@@ -106,14 +106,14 @@
     "run-headless-chromium": "^0.1.1",
     "sass-loader": "^8.0.2",
     "sinon": "^8.1.1",
-    "sizzle": "^2.3.4",
+    "sizzle": "^2.3.5",
     "style-loader": "^0.23.1",
     "uglify-es": "^3.3.9",
     "uglify-js": "^3.7.4",
     "urijs": "^1.19.1",
     "webpack": "^4.42.1",
     "webpack-cli": "^3.3.11",
-    "webpack-dev-server": "^3.8.0",
+    "webpack-dev-server": "^3.10.3",
     "webpack-merge": "^4.2.1",
     "xss": "^1.0.6"
   }

tests/mock.js

@@ -263,6 +263,7 @@
             'animate': false,
             'auto_subscribe': false,
             'bosh_service_url': 'montague.lit/http-bind',
+            'discover_connection_methods': false,
             'enable_smacks': false,
             'i18n': 'en',
             // 'persistent_store': 'IndexedDB',