Bump terser-webpack-plugin from 2.2.1 to 2.3.1

Bumps [terser-webpack-plugin](https://github.com/webpack-contrib/terser-webpack-plugin) from 2.2.1 to 2.3.1.
- [Release notes](https://github.com/webpack-contrib/terser-webpack-plugin/releases)
- [Changelog](https://github.com/webpack-contrib/terser-webpack-plugin/blob/master/CHANGELOG.md)
- [Commits](webpack-contrib/terser-webpack-plugin@v2.2.1...v2.3.1)

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

package.json

@@ -127,7 +127,7 @@
     "svgo": "1.3.2",
     "svgo-loader": "2.2.1",
     "terser": "4.4.2",
-    "terser-webpack-plugin": "2.2.1",
+    "terser-webpack-plugin": "2.3.1",
     "ts-node": "8.5.2",
     "tsconfig-paths": "3.9.0",
     "typedoc": "0.15.6",