Bump terser from 4.8.0 to 5.0.0

Bumps [terser](https://github.com/terser/terser) from 4.8.0 to 5.0.0.
- [Release notes](https://github.com/terser/terser/releases)
- [Changelog](https://github.com/terser/terser/blob/master/CHANGELOG.md)
- [Commits](https://github.com/terser/terser/compare/v4.8.0...v5.0.0)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

package.json

@@ -90,7 +90,7 @@
     "showdown": "^1.6.4",
     "sinon": "^9.0.0",
     "stringify": "^5.1.0",
-    "terser": "^4.4.0",
+    "terser": "^5.0.0",
     "through2": "^4.0.1",
     "tiny-emitter": "^2.0.2",
     "typescript": "^3.9.5",

yarn.lock

@@ -7569,10 +7569,10 @@ teeny-request@6.0.1:
     stream-events "^1.0.5"
     uuid "^3.3.2"
 
-terser@^4.4.0:
-  version "4.8.0"
-  resolved "https://registry.yarnpkg.com/terser/-/terser-4.8.0.tgz#63056343d7c70bb29f3af665865a46fe03a0df17"
-  integrity sha512-EAPipTNeWsb/3wLPeup1tVPaXfIaU68xMnVdPafIL1TV05OhASArYyIfFvnvJCNrR2NIOvDVNNTFRa+Re2MWyw==
+terser@^5.0.0:
+  version "5.0.0"
+  resolved "https://registry.yarnpkg.com/terser/-/terser-5.0.0.tgz#269640e4e92f15d628de1e5f01c4c61e1ba3d765"
+  integrity sha512-olH2DwGINoSuEpSGd+BsPuAQaA3OrHnHnFL/rDB2TVNc3srUbz/rq/j2BlF4zDXI+JqAvGr86bIm1R2cJgZ3FA==
   dependencies:
     commander "^2.20.0"
     source-map "~0.6.1"