chore(deps): update dependency @types/mocha to v7

Author: renovate-bot

package.json

@@ -52,7 +52,7 @@
     "@sourcegraph/prettierrc": "^2.2.0",
     "@sourcegraph/tsconfig": "^4.0.1",
     "@sourcegraph/tslint-config": "^13.4.0",
-    "@types/mocha": "5.2.7",
+    "@types/mocha": "7.0.2",
     "husky": "^2.1.0",
     "mocha": "^6.1.4",
     "nyc": "^14.1.0",

yarn.lock

@@ -422,10 +422,10 @@
   resolved "https://registry.npmjs.org/@types/minimatch/-/minimatch-3.0.3.tgz#3dca0e3f33b200fc7d1139c0cd96c1268cadfd9d"
   integrity sha512-tHq6qdbT9U1IRSGf14CL0pUlULksvY9OZ+5eEgl1N7t+OA3tGvNpxJCzuKQlsNgCVwbAs670L1vcVQi8j9HjnA==
 
-"@types/mocha@5.2.7":
-  version "5.2.7"
-  resolved "https://registry.yarnpkg.com/@types/mocha/-/mocha-5.2.7.tgz#315d570ccb56c53452ff8638738df60726d5b6ea"
-  integrity sha512-NYrtPht0wGzhwe9+/idPaBB+TqkY9AhTvOLMkThm0IoEfLaiVQZwBwyJ5puCkO3AUCWrmcoePjp2mbFocKy4SQ==
+"@types/mocha@7.0.2":
+  version "7.0.2"
+  resolved "https://registry.yarnpkg.com/@types/mocha/-/mocha-7.0.2.tgz#b17f16cf933597e10d6d78eae3251e692ce8b0ce"
+  integrity sha512-ZvO2tAcjmMi8V/5Z3JsyofMe3hasRcaw88cto5etSVMwVQfeivGAlEYmaQgceUSVYFofVjT+ioHsATjdWcFt1w==
 
 "@types/node@*":
   version "12.6.8"