Update dependency express to v4.17.1 (#381)

Author: renovate[bot]

package.json

@@ -11,7 +11,7 @@
   },
   "dependencies": {
     "clean-css": "4.2.1",
-    "express": "4.17.0",
+    "express": "4.17.1",
     "express-history-api-fallback": "2.2.1",
     "highland": "2.13.4",
     "html-minifier": "4.0.0",

yarn.lock

@@ -1188,9 +1188,9 @@ [email protected]:
   version "2.2.1"
   resolved "https://registry.yarnpkg.com/express-history-api-fallback/-/express-history-api-fallback-2.2.1.tgz#3a2ad27f7bebc90fc533d110d7c6d83097bcd057"
 
-[email protected].0:
-  version "4.17.0"
-  resolved "https://registry.yarnpkg.com/express/-/express-4.17.0.tgz#288af62228a73f4c8ea2990ba3b791bb87cd4438"
+[email protected].1:
+  version "4.17.1"
+  resolved "https://registry.yarnpkg.com/express/-/express-4.17.1.tgz#4491fc38605cf51f8629d39c2b5d026f98a4c134"
   dependencies:
     accepts "~1.3.7"
     array-flatten "1.1.1"