refactor: upgrade prismjs from 1.27.0 to 1.28.0 (#2127)

Author: snyk-bot

package-lock.json

@@ -57,7 +57,7 @@
     "parse": "3.4.1",
     "passport": "0.5.2",
     "passport-local": "1.0.0",
-    "prismjs": "1.27.0",
+    "prismjs": "1.28.0",
     "prop-types": "15.8.1",
     "qrcode": "1.5.0",
     "react": "16.14.0",