Import upstream changes (afff4c174f131b6461be1ac86e2ceb4201030a8a)

Author: lit-robot

package.json

@@ -46,7 +46,7 @@
   "devDependencies": {
     "@11ty/eleventy": "^1.0.1",
     "@11ty/eleventy-plugin-syntaxhighlight": "^4.0.0",
-    "@custom-elements-manifest/analyzer": "^0.5.7",
+    "@custom-elements-manifest/analyzer": "^0.6.3",
     "@open-wc/testing": "^3.1.5",
     "@rollup/plugin-node-resolve": "^13.3.0",
     "@rollup/plugin-replace": "^4.0.0",