Bump terser from 5.5.1 to 5.6.0 (#3413)

Bumps [terser](https://github.com/terser/terser) from 5.5.1 to 5.6.0.
- [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>

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

package-lock.json

@@ -12088,9 +12088,9 @@
       "dev": true
     },
     "terser": {
-      "version": "5.5.1",
-      "resolved": "https://registry.npmjs.org/terser/-/terser-5.5.1.tgz",
-      "integrity": "sha512-6VGWZNVP2KTUcltUQJ25TtNjx/XgdDsBDKGt8nN0MpydU36LmbPPcMBd2kmtZNNGVVDLg44k7GKeHHj+4zPIBQ==",
+      "version": "5.6.0",
+      "resolved": "https://registry.npmjs.org/terser/-/terser-5.6.0.tgz",
+      "integrity": "sha512-vyqLMoqadC1uR0vywqOZzriDYzgEkNJFK4q9GeyOBHIbiECHiWLKcWfbQWAUaPfxkjDhapSlZB9f7fkMrvkVjA==",
       "dev": true,
       "requires": {
         "commander": "^2.20.0",

package.json

@@ -156,7 +156,7 @@
     "rollup": "^2.39.0",
     "stylelint": "^13.9.0",
     "stylelint-config-twbs-bootstrap": "^2.1.0",
-    "terser": "^5.5.1",
+    "terser": "^5.6.0",
     "vnu-jar": "^21.2.5"
   }
 }