Update vendored modernizr

package.json

@@ -67,7 +67,6 @@
     "highlight.js": "^9.13.1",
     "matrix-js-sdk": "github:matrix-org/matrix-js-sdk#develop",
     "matrix-react-sdk": "github:matrix-org/matrix-react-sdk#develop",
-    "modernizr": "^3.6.0",
     "olm": "https://packages.matrix.org/npm/olm/olm-3.1.4.tgz",
     "postcss-easings": "^2.0.0",
     "prop-types": "^15.7.2",
@@ -131,6 +130,7 @@
     "mini-css-extract-plugin": "^0.8.0",
     "minimist": "^1.2.0",
     "mkdirp": "^0.5.1",
+    "modernizr": "^3.6.0",
     "optimize-css-assets-webpack-plugin": "^5.0.3",
     "postcss-extend": "^1.0.5",
     "postcss-import": "^12.0.1",