Revert "Upgrade fs-extra"

This reverts commit 7711d22.

package.json

@@ -66,7 +66,7 @@
     "ember-try-config": "^3.0.0",
     "execa": "^1.0.0",
     "extend": "^3.0.0",
-    "fs-extra": "^7.0.0",
+    "fs-extra": "^5.0.0",
     "promise-map-series": "^0.2.1",
     "resolve": "^1.1.6",
     "rimraf": "^2.3.2",

yarn.lock

@@ -3189,14 +3189,6 @@ fs-extra@^5.0.0:
     jsonfile "^4.0.0"
     universalify "^0.1.0"
 
-fs-extra@^7.0.0:
-  version "7.0.0"
-  resolved "https://registry.yarnpkg.com/fs-extra/-/fs-extra-7.0.0.tgz#8cc3f47ce07ef7b3593a11b9fb245f7e34c041d6"
-  dependencies:
-    graceful-fs "^4.1.2"
-    jsonfile "^4.0.0"
-    universalify "^0.1.0"
-
 fs-minipass@^1.2.5:
   version "1.2.5"
   resolved "https://registry.yarnpkg.com/fs-minipass/-/fs-minipass-1.2.5.tgz#06c277218454ec288df77ada54a03b8702aacb9d"