fixup! fixup! WIP feat: make lockfileVersion configurable

lib/shrinkwrap.js

@@ -895,31 +895,32 @@ class Shrinkwrap {
       }
     }
 
+    // if we haven't set it by now, use the default
+    if (!this.lockfileVersion) {
+      this.lockfileVersion = defaultLockfileVersion
+    }
+    this.data.lockfileVersion = this.lockfileVersion
+
     // hidden lockfiles don't include legacy metadata or a root entry
     if (this.hiddenLockfile) {
       delete this.data.packages['']
       delete this.data.dependencies
-    } else if (this.tree) {
+    } else if (this.tree && this.lockfileVersion <= 3) {
       this[_buildLegacyLockfile](this.tree, this.data)
     }
 
-    // if we haven't set it by now, use the default
-    if (!this.lockfileVersion) {
-      this.lockfileVersion = defaultLockfileVersion
-    }
-    this.data.lockfileVersion = this.lockfileVersion
-
-    const data = { ...this.data }
     // lf version 1 = dependencies only
     // lf version 2 = dependencies and packages
     // lf version 3 = packages only
     if (this.lockfileVersion >= 3) {
-      delete data.dependencies
+      const { dependencies, ...data } = this.data
+      return data
     } else if (this.lockfileVersion < 2) {
-      delete data.packages
+      const { packages, ...data } = this.data
+      return data
+    } else {
+      return { ...this.data }
     }
-
-    return data
   }
 
   [_buildLegacyLockfile] (node, lock, path = []) {