build(deps): update dependency prismjs to v1.27.0 [security]

Author: renovate[bot]

package.json

@@ -59,7 +59,7 @@
     "gatsby-transformer-sharp": "2.4.4",
     "hex2rgba": "0.0.1",
     "normalize.css": "^8.0.1",
-    "prismjs": "1.20.0",
+    "prismjs": "1.27.0",
     "prop-types": "15.7.2",
     "react": "^16.8.6",
     "react-dom": "^16.8.6",