Merge pull request #66 from issue-ops/dependabot/npm_and_yarn/gatsby-plugin-sitemap-6.13.1

Bump gatsby-plugin-sitemap from 6.12.3 to 6.13.1

Author: ncalteen

gatsby-theme-doctocat-typescript/package.json

@@ -48,7 +48,7 @@
     "gatsby-plugin-mdx": "^5.13.1",
     "gatsby-plugin-postcss": "^6.13.1",
     "gatsby-plugin-sharp": "^5.13.1",
-    "gatsby-plugin-sitemap": "^6.12.3",
+    "gatsby-plugin-sitemap": "^6.13.1",
     "gatsby-plugin-styled-components": "^6.12.0",
     "gatsby-remark-images": "^7.12.3",
     "gatsby-source-filesystem": "^5.12.1",