Update dependency slug to v4.0.1

Author: renovate-bot

realworld/backend/package-lock.json

@@ -33,7 +33,7 @@
     "passport": "0.4.1",
     "passport-local": "1.0.0",
     "request": "2.88.2",
-    "slug": "4.0.0",
+    "slug": "4.0.1",
     "underscore": "1.11.0"
   },
   "devDependencies": {

realworld/backend/package.json

@@ -2082,10 +2082,10 @@ [email protected]:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/sliced/-/sliced-1.0.1.tgz#0b3a662b5d04c3177b1926bea82b03f837a2ef41"
 
-[email protected].0:
-  version "4.0.0"
-  resolved "https://registry.yarnpkg.com/slug/-/slug-4.0.0.tgz#5d542dd61b2cd2f59772790bbebc190851f0518c"
-  integrity sha512-niZMkmb/nVnfp0ppfIxbLoJCqWLiLa8aYsM5Sn/k0nhOHAqMfOoT2hOh2M/vaWtVaQFlnw7DF65nt07InzibJw==
+[email protected].1:
+  version "4.0.1"
+  resolved "https://registry.yarnpkg.com/slug/-/slug-4.0.1.tgz#24775a0fbb7fabae2f94e34bdfab0a32ed3bc1ba"
+  integrity sha512-g3eofiaQdlNRrjGSW+gtSHmAdE8Oq/tFIrFlP6oQ4AW4M3l3FegO2C4TV6MM4eHdnpllJJdgG892Vt/KqpV9kQ==
 
 source-map@^0.6.1, source-map@~0.6.1:
   version "0.6.1"