fix: temporary downgrade marked as it introduced breaking changes and a few bugs

Author: RomanHotsiy

package.json

@@ -131,7 +131,7 @@
     "json-schema-ref-parser": "^5.0.0",
     "lunr": "^2.2.1",
     "mark.js": "^8.11.1",
-    "marked": "^0.4.0",
+    "marked": "0.3.18",
     "mobx": "^4.3.0",
     "mobx-react": "^5.0.0",
     "openapi-sampler": "1.0.0-beta.12",

yarn.lock

@@ -6542,9 +6542,9 @@ mark.js@^8.11.1:
   version "8.11.1"
   resolved "https://registry.yarnpkg.com/mark.js/-/mark.js-8.11.1.tgz#180f1f9ebef8b0e638e4166ad52db879beb2ffc5"
 
-marked@^0.4.0:
-  version "0.4.0"
-  resolved "https://registry.yarnpkg.com/marked/-/marked-0.4.0.tgz#9ad2c2a7a1791f10a852e0112f77b571dce10c66"
+marked@0.3.18:
+  version "0.3.18"
+  resolved "https://registry.yarnpkg.com/marked/-/marked-0.3.18.tgz#3ef058cd926101849b92a7a7c15db18c7fc76b2f"
 
 math-expression-evaluator@^1.2.14:
   version "1.2.17"