Bump terser from 4.6.10 to 5.3.8 (#253)

Bumps [terser](https://github.com/terser/terser) from 4.6.10 to 5.3.8.
- [Release notes](https://github.com/terser/terser/releases)
- [Changelog](https://github.com/terser/terser/blob/master/CHANGELOG.md)
- [Commits](terser/terser@v4.6.10...v5.3.8)

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

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

package.json

@@ -92,7 +92,7 @@
     "rollup-plugin-node-resolve": "^5.2.0",
     "rollup-plugin-replace": "^2.2.0",
     "rollup-plugin-terser": "^5.3.1",
-    "terser": "^4.6.10"
+    "terser": "^5.3.8"
   },
   "dependencies": {
     "@babel/runtime": "^7.10.4",