Bump @types/http-proxy from 1.17.8 to 1.17.9 (#5320)

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

package.json

@@ -299,7 +299,7 @@
     "@types/gunzip-maybe": "^1.4.0",
     "@types/hoist-non-react-statics": "^3.3.1",
     "@types/html-webpack-plugin": "^3.2.6",
-    "@types/http-proxy": "^1.17.8",
+    "@types/http-proxy": "^1.17.9",
     "@types/jest": "^26.0.24",
     "@types/js-yaml": "^4.0.5",
     "@types/jsdom": "^16.2.14",