chore(deps): update dependency slash to v4 (#4118)

Author: renovate[bot]

packages/plugin-vue/package.json

@@ -38,7 +38,7 @@
     "debug": "^4.3.2",
     "hash-sum": "^2.0.0",
     "rollup": "^2.38.5",
-    "slash": "^3.0.0",
+    "slash": "^4.0.0",
     "source-map": "^0.6.1"
   }
 }

yarn.lock

@@ -6913,6 +6913,11 @@ slash@^3.0.0:
   resolved "https://registry.yarnpkg.com/slash/-/slash-3.0.0.tgz#6539be870c165adbd5240220dbe361f1bc4d4634"
   integrity sha512-g9Q1haeby36OSStwb4ntCGGGaKsaVSjQ68fBxoQcutl5fS1vuY18H3wSt3jFyFtrkx+Kz0V1G85A4MyAdDMi2Q==
 
+slash@^4.0.0:
+  version "4.0.0"
+  resolved "https://registry.yarnpkg.com/slash/-/slash-4.0.0.tgz#2422372176c4c6c5addb5e2ada885af984b396a7"
+  integrity sha512-3dOsAHXXUkQTpOYcoAxLIorMTp4gIQr5IW3iVb7A7lFIp0VHhnynm9izx6TssdrIcVIESAlVjtnO2K8bg+Coew==
+
 slice-ansi@^3.0.0:
   version "3.0.0"
   resolved "https://registry.yarnpkg.com/slice-ansi/-/slice-ansi-3.0.0.tgz#31ddc10930a1b7e0b67b08c96c2f49b77a789787"