chore(deps): update dependency @types/gulp to v4.0.18 (#429)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

package.json

@@ -22,7 +22,7 @@
   "devDependencies": {
     "@types/browser-sync": "2.29.1",
     "@types/browserify": "12.0.40",
-    "@types/gulp": "4.0.17",
+    "@types/gulp": "4.0.18",
     "@types/gulp-autoprefixer": "0.0.37",
     "@types/gulp-changed": "0.0.39",
     "@types/gulp-csso": "4.0.5",

yarn.lock

@@ -1014,10 +1014,10 @@
   dependencies:
     "@types/node" "*"
 
-"@types/gulp@4.0.17":
-  version "4.0.17"
-  resolved "https://registry.yarnpkg.com/@types/gulp/-/gulp-4.0.17.tgz#b314c3762d08d8d69b7c0b86f78d069bafd65009"
-  integrity sha512-+pKQynu2C/HS16kgmDlAicjtFYP8kaa86eE9P0Ae7GB5W29we/E2TIdbOWtEZD5XkpY+jr8fyqfwO6SWZecLpQ==
+"@types/gulp@4.0.18":
+  version "4.0.18"
+  resolved "https://registry.yarnpkg.com/@types/gulp/-/gulp-4.0.18.tgz#2dd43f432452f10412ef2479d44e4d4f0c8f53f6"
+  integrity sha512-IqkYa4sXkwH2uwqO2aXYOoAisJpLX13BPaS6lmEAoG4BbgOay3qqGQFsT9LMSSQVMQlEKU7wTUW0sPV46V0olw==
   dependencies:
     "@types/node" "*"
     "@types/undertaker" ">=1.2.6"