Parse <script type=application/json> as JSON

This extends 3fd4636 to also support
application/json and subtypes of it as JSON.

FIX: Parse `script` tags with `application/json` type as JSON syntax.

Ref: https://crbug.com/1505381

src/html.ts

@@ -28,7 +28,9 @@ const defaultNesting: NestedLang[] = [
    attrs: attrs => attrs.type == "text/typescript-jsx",
    parser: tsxLanguage.parser},
   {tag: "script",
-   attrs: attrs => attrs.type == "importmap" || attrs.type == "speculationrules",
+   attrs(attrs) {
+     return /^(importmap|speculationrules|application\/(.+\+)?json)$/i.test(attrs.type)
+   },
    parser: jsonParser},
   {tag: "script",
    attrs(attrs) {