fix: upgrade prismjs from 1.17.1 to 1.19.0

Snyk has created this PR to upgrade prismjs from 1.17.1 to 1.19.0.

See this package in NPM:
https://www.npmjs.com/package/prismjs

See this project in Snyk:
https://app.snyk.io/org/anikethsaha/project/836f877b-b98e-47ed-89fc-554e9b2e146d?utm_source=github&utm_medium=upgrade-pr

package.json

@@ -63,7 +63,7 @@
     "marked": "^0.7.0",
     "medium-zoom": "^1.0.5",
     "opencollective-postinstall": "^2.0.2",
-    "prismjs": "^1.15.0",
+    "prismjs": "^1.19.0",
     "strip-indent": "^3.0.0",
     "tinydate": "^1.0.0",
     "tweezer.js": "^1.4.0"