Bump terser from 1.1.13 to 1.1.15

Bumps [terser](https://github.com/ahorek/terser-ruby) from 1.1.13 to 1.1.15.
- [Release notes](https://github.com/ahorek/terser-ruby/releases)
- [Changelog](https://github.com/ahorek/terser-ruby/blob/master/CHANGELOG.md)
- [Commits](ahorek/terser-ruby@1.1.13...1.1.15)

---
updated-dependencies:
- dependency-name: terser
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

Gemfile.lock

@@ -1641,7 +1641,7 @@ GEM
       stripe (>= 2.8, < 9)
     terrapin (0.6.0)
       climate_control (>= 0.0.3, < 1.0)
-    terser (1.1.13)
+    terser (1.1.15)
       execjs (>= 0.3.0, < 3)
     text-hyphen (1.4.1)
     textstat (0.1.8)