Update dependency webpack-cli to v3.3.7

package.json

@@ -75,7 +75,7 @@
     "taskcluster-client-web": "8.1.1",
     "taskcluster-lib-scopes": "10.0.2",
     "webpack": "4.39.2",
-    "webpack-cli": "3.3.6"
+    "webpack-cli": "3.3.7"
   },
   "devDependencies": {
     "@neutrinojs/eslint": "9.0.0-rc.3",

yarn.lock

@@ -9704,10 +9704,10 @@ webpack-chain@^6.0.0:
     deepmerge "^1.5.2"
     javascript-stringify "^2.0.0"
 
-webpack-cli@3.3.6:
-  version "3.3.6"
-  resolved "https://registry.yarnpkg.com/webpack-cli/-/webpack-cli-3.3.6.tgz#2c8c399a2642133f8d736a359007a052e060032c"
-  integrity sha512-0vEa83M7kJtxK/jUhlpZ27WHIOndz5mghWL2O53kiDoA9DIxSKnfqB92LoqEn77cT4f3H2cZm1BMEat/6AZz3A==
+webpack-cli@3.3.7:
+  version "3.3.7"
+  resolved "https://registry.yarnpkg.com/webpack-cli/-/webpack-cli-3.3.7.tgz#77c8580dd8e92f69d635e0238eaf9d9c15759a91"
+  integrity sha512-OhTUCttAsr+IZSMVwGROGRHvT+QAs8H6/mHIl4SvhAwYywjiylYjpwybGx7WQ9Hkb45FhjtsymkwiRRbGJ1SZQ==
   dependencies:
     chalk "2.4.2"
     cross-spawn "6.0.5"