Add CDDL dfns types to extracts schema (#1751)

Forgotten when adding support to CDDL types...

Author: tidoust

schemas/browserlib/extract-dfns.json

@@ -33,6 +33,8 @@
 
           "element", "element-state", "element-attr", "attr-value",
 
+          "cddl-module", "cddl-type", "cddl-parameter", "cddl-key", "cddl-value",
+
           "scheme", "http-header",
 
           "grammar", "abstract-op", "dfn"

tests/extract-dfns.js

@@ -726,6 +726,14 @@ When initialize(<var>newItem</var>) is called, the following steps are run:</p>`
       htmlProse: "<dfn>Foo</dfn> enters a bar."
     }]
   },
+
+  {
+    title: "extracts CDDL definitions",
+    html: `<p>
+      <dfn id='foo' data-dfn-type='cddl-type'>Foo</dfn> is a CDDL type.
+    </p>`,
+    changesToBaseDfn: [{type: 'cddl-type'}]
+  },
 ];
 
 describe("Test definition extraction", function () {