Bump memory-fs from 0.4.1 to 0.5.0

Bumps [memory-fs](https://github.com/webpack/memory-fs) from 0.4.1 to 0.5.0.
- [Release notes](https://github.com/webpack/memory-fs/releases)
- [Commits](webpack/memory-fs@v0.4.1...v0.5.0)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

package.json

@@ -16,7 +16,7 @@
     "eslint": "^6.0.1",
     "fest": "^0.12.1",
     "jest": "^24.8.0",
-    "memory-fs": "^0.4.1",
+    "memory-fs": "^0.5.0",
     "webpack": "^4.36.1",
     "xml2js": "^0.4.23"
   },