Bump marked from 0.6.3 to 0.7.0

Bumps [marked](https://github.com/markedjs/marked) from 0.6.3 to 0.7.0.
- [Release notes](https://github.com/markedjs/marked/releases)
- [Changelog](https://github.com/markedjs/marked/blob/master/release.config.js)
- [Commits](markedjs/marked@v0.6.3...v0.7.0)

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

package-lock.json

@@ -21,7 +21,7 @@
     "gatsby-transformer-remark": "2.8.14",
     "js-yaml": "^3.12.2",
     "lodash": "^4.17.11",
-    "marked": "^0.6.1",
+    "marked": "^0.7.0",
     "moment": "^2.23.0",
     "moment-strftime": "^0.5.0",
     "node-sass": "^4.11.0",