fix(readme): security vulnerabilities in marked dep

https://app.snyk.io/org/juanpicado/project/078b04c1-9bef-4d55-ba1e-fb5587471796

Author: juanpicado

core/readme/package.json

@@ -23,7 +23,7 @@
   "dependencies": {
     "dompurify": "1.0.11",
     "jsdom": "15.1.1",
-    "marked": "0.6.2"
+    "marked": "0.7.0"
   },
   "devDependencies": {
     "@verdaccio/babel-preset": "^2.0.0",

yarn.lock

@@ -6456,10 +6456,10 @@ map-visit@^1.0.0:
   dependencies:
     object-visit "^1.0.0"
 
-marked@0.6.2:
-  version "0.6.2"
-  resolved "https://registry.verdaccio.org/marked/-/marked-0.6.2.tgz#c574be8b545a8b48641456ca1dbe0e37b6dccc1a"
-  integrity sha512-LqxwVH3P/rqKX4EKGz7+c2G9r98WeM/SW34ybhgNGhUQNKtf1GmmSkJ6cDGJ/t6tiyae49qRkpyTw2B9HOrgUA==
+marked@0.7.0:
+  version "0.7.0"
+  resolved "https://registry.verdaccio.org/marked/-/marked-0.7.0.tgz#b64201f051d271b1edc10a04d1ae9b74bb8e5c0e"
+  integrity sha512-c+yYdCZJQrsRjTPhUx7VKkApw9bwDkNbHUKo1ovgcfDjb2kc8rLuRbIFyXL5WOEUwzSSKo3IXpph2K6DqB/KZg==
 
 media-typer@0.3.0:
   version "0.3.0"