Bump terser from 5.14.1 to 5.16.9 in /tester

Bumps [terser](https://github.com/terser/terser) from 5.14.1 to 5.16.9.
- [Release notes](https://github.com/terser/terser/releases)
- [Changelog](https://github.com/terser/terser/blob/master/CHANGELOG.md)
- [Commits](terser/terser@v5.14.1...v5.16.9)

---
updated-dependencies:
- dependency-name: terser
  dependency-type: indirect
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

Diff for: tester/yarn.lock

@@ -4165,9 +4165,9 @@ terser-webpack-plugin@^5.1.3:
     terser "^5.7.2"
 
 terser@^5.10.0, terser@^5.7.2:
-  version "5.14.1"
-  resolved "https://registry.yarnpkg.com/terser/-/terser-5.14.1.tgz#7c95eec36436cb11cf1902cc79ac564741d19eca"
-  integrity sha512-+ahUAE+iheqBTDxXhTisdA8hgvbEG1hHOQ9xmNjeUJSoi6DU/gMrKNcfZjHkyY6Alnuyc+ikYJaxxfHkT3+WuQ==
+  version "5.16.9"
+  resolved "https://registry.yarnpkg.com/terser/-/terser-5.16.9.tgz#7a28cb178e330c484369886f2afd623d9847495f"
+  integrity sha512-HPa/FdTB9XGI2H1/keLFZHxl6WNvAI4YalHGtDQTlMnJcoqSab1UwL4l1hGEhs6/GmLHBZIg/YgB++jcbzoOEg==
   dependencies:
     "@jridgewell/source-map" "^0.3.2"
     acorn "^8.5.0"