build(deps): bump prismjs from 1.15.0 to 1.27.0

Bumps [prismjs](https://github.com/PrismJS/prism) from 1.15.0 to 1.27.0.
- [Release notes](https://github.com/PrismJS/prism/releases)
- [Changelog](https://github.com/PrismJS/prism/blob/master/CHANGELOG.md)
- [Commits](PrismJS/prism@v1.15.0...v1.27.0)

---
updated-dependencies:
- dependency-name: prismjs
  dependency-type: direct:production
...

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

package.json

@@ -39,7 +39,7 @@
     "object-assign": "4.1.1",
     "postcss-flexbugs-fixes": "3.2.0",
     "postcss-loader": "2.0.8",
-    "prismjs": "^1.15.0",
+    "prismjs": "^1.27.0",
     "promise": "8.0.1",
     "raf": "3.4.0",
     "react": "^16.4.1",