Update dependency uglifyjs-webpack-plugin to v2.1.3

[renovate]

This PR contains the following updates:

Package	Type	Update	Change	References
uglifyjs-webpack-plugin	devDependencies	patch	2.1.2 -> 2.1.3	source
uglifyjs-webpack-plugin	dependencies	patch	2.1.2 -> 2.1.3	source

---

Release Notes

webpack-contrib/uglifyjs-webpack-plugin

v2.1.3

Compare Source

---

Renovate configuration

📅 Schedule: At any time (no schedule defined).

🚦 Automerge: Disabled by config. Please merge this manually once you are satisfied.

♻️ Rebasing: Whenever PR becomes conflicted, or if you modify the PR title to begin with "rebase!".

🔕 Ignore: Close this PR and you won't be reminded about these updates again.

---

• If you want to rebase/retry this PR, check this box

---

This PR has been generated by Renovate Bot. View repository job log here.