Bump marked from 0.3.9 to 0.3.18

Bumps [marked](https://github.com/markedjs/marked) from 0.3.9 to 0.3.18.
- [Release notes](https://github.com/markedjs/marked/releases)
- [Commits](https://github.com/markedjs/marked/compare/0.3.9...v0.3.18)

Signed-off-by: dependabot[bot] <support@github.com>

package.json

@@ -35,7 +35,7 @@
     "highlight.js": "9.12.0",
     "history": "4.7.2",
     "live-server": "1.2.0",
-    "marked": "0.3.9",
+    "marked": "0.3.18",
     "moment": "2.22.1",
     "postcss-cli": "4.1.1",
     "postcss-css-variables": "0.8.0",