Bump terser from 5.5.1 to 5.6.1

Bumps [terser](https://github.com/terser/terser) from 5.5.1 to 5.6.1.
- [Release notes](https://github.com/terser/terser/releases)
- [Changelog](https://github.com/terser/terser/blob/master/CHANGELOG.md)
- [Commits](https://github.com/terser/terser/commits)

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

package.json

@@ -18,7 +18,7 @@
   "dependencies": {
     "bulma": "^0.9.1",
     "instant.page": "^5.1.0",
-    "terser": "^5.5.1"
+    "terser": "^5.6.1"
   },
   "devDependencies": {
     "stylelint": "^13.8.0",