chore(deps): delete ^ from http-proxy-middleware (#2260)

Author: hiroppy

package-lock.json

@@ -45,7 +45,7 @@
     "del": "^4.1.1",
     "express": "^4.17.1",
     "html-entities": "^1.2.1",
-    "http-proxy-middleware": "^0.19.1",
+    "http-proxy-middleware": "0.19.1",
     "import-local": "^2.0.0",
     "internal-ip": "^4.3.0",
     "ip": "^1.1.5",