build: add hash-sum as a dependency

Author: elevatebart

package-lock.json

@@ -15,6 +15,7 @@
   "dependencies": {
     "core-js": "^3.6.5",
     "debounce": "^1.2.0",
+    "hash-sum": "^2.0.0",
     "prismjs": "^1.16.0",
     "vue-gh-corners": "^3.0.1",
     "vue-github-corners": "^1.2.3",