Update dependency @types/mocha to v8

Author: renovate-bot

package-lock.json

@@ -182,7 +182,7 @@
     "@sourcegraph/tslint-config": "^13.4.0",
     "@types/expect": "1.20.4",
     "@types/lodash": "4.14.170",
-    "@types/mocha": "5.2.7",
+    "@types/mocha": "8.2.2",
     "@types/mock-require": "2.0.0",
     "@types/node": "14.17.2",
     "@types/sinon": "10.0.2",

package.json

@@ -911,10 +911,10 @@
   resolved "https://registry.npmjs.org/@types/lodash/-/lodash-4.14.170.tgz"
   integrity sha512-bpcvu/MKHHeYX+qeEN8GE7DIravODWdACVA1ctevD8CN24RhPZIKMn9ntfAsrvLfSX3cR5RrBKAbYm9bGs0A+Q==
 
-"@types/mocha@5.2.7":
-  version "5.2.7"
-  resolved "https://registry.npmjs.org/@types/mocha/-/mocha-5.2.7.tgz"
-  integrity sha512-NYrtPht0wGzhwe9+/idPaBB+TqkY9AhTvOLMkThm0IoEfLaiVQZwBwyJ5puCkO3AUCWrmcoePjp2mbFocKy4SQ==
+"@types/mocha@8.2.2":
+  version "8.2.2"
+  resolved "https://registry.npmjs.org/@types/mocha/-/mocha-8.2.2.tgz"
+  integrity sha512-Lwh0lzzqT5Pqh6z61P3c3P5nm6fzQK/MMHl9UKeneAeInVflBSz1O2EkX6gM6xfJd7FBXBY5purtLx7fUiZ7Hw==
 
 "@types/mock-require@2.0.0":
   version "2.0.0"