Bump terser from 4.8.0 to 5.6.1

Bumps [terser](https://github.com/terser/terser) from 4.8.0 to 5.6.1.
- [Release notes](https://github.com/terser/terser/releases)
- [Changelog](https://github.com/terser/terser/blob/master/CHANGELOG.md)
- [Commits](https://github.com/terser/terser/commits)

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

package-lock.json

@@ -2601,13 +2601,20 @@
       }
     },
     "terser": {
-      "version": "4.8.0",
+      "version": "5.6.1",
-      "resolved": "https://registry.npmjs.org/terser/-/terser-4.8.0.tgz",
+      "resolved": "https://registry.npmjs.org/terser/-/terser-5.6.1.tgz",
-      "integrity": "sha512-EAPipTNeWsb/3wLPeup1tVPaXfIaU68xMnVdPafIL1TV05OhASArYyIfFvnvJCNrR2NIOvDVNNTFRa+Re2MWyw==",
+      "integrity": "sha512-yv9YLFQQ+3ZqgWCUk+pvNJwgUTdlIxUk1WTN+RnaFJe2L7ipG2csPT0ra2XRm7Cs8cxN7QXmK1rFzEwYEQkzXw==",
       "requires": {
         "commander": "^2.20.0",
-        "source-map": "~0.6.1",
+        "source-map": "~0.7.2",
-        "source-map-support": "~0.5.12"
+        "source-map-support": "~0.5.19"
+      },
+      "dependencies": {
+        "source-map": {
+          "version": "0.7.3",
+          "resolved": "https://registry.npmjs.org/source-map/-/source-map-0.7.3.tgz",
+          "integrity": "sha512-CkCj6giN3S+n9qrYiBTX5gystlENnRW5jZeNLHpe6aue+SrHcG5VYwujhW9s4dY31mEGsxBDrHR6oI69fTXsaQ=="
+        }
       }
     },
     "text-table": {

package.json

@@ -5,6 +5,6 @@
     "html-minifier": "^4.0.0",
     "stylelint": "^13.12.0",
     "stylelint-config-standard": "^21.0.0",
-    "terser": "^4.8.0"
+    "terser": "^5.6.1"
   }
 }