fix(package): update gatsby-remark-copy-linked-files to version 2.0.6

Closes #30

Author: greenkeeper[bot]

package.json

@@ -25,7 +25,7 @@
     "gatsby-plugin-styled-components": "^2.0.5",
     "gatsby-plugin-typography": "^1.7.13",
     "gatsby-remark-autolink-headers": "^1.4.12",
-    "gatsby-remark-copy-linked-files": "^1.5.25",
+    "gatsby-remark-copy-linked-files": "^2.0.6",
     "gatsby-remark-images": "^1.5.37",
     "gatsby-remark-prismjs": "^2.0.4",
     "gatsby-remark-responsive-iframe": "^1.4.16",