fix: relative link error

lib/filesystem.js

@@ -101,12 +101,12 @@ class Filesystem {
   insertLink (p) {
     const symlink = fs.readlinkSync(p)
     const parentPath = path.dirname(p)
-    const link = path.relative(fs.realpathSync(this.src), path.join(parentPath, symlink))
+    const link = path.resolve(parentPath, symlink)
     if (link.substr(0, 2) === '..') {
       throw new Error(`${p}: file "${link}" links out of the package`)
     }
     const node = this.searchNodeFromPath(p)
-    node.link = link
+    node.link = path.relative(fs.realpathSync(this.src), link)
     return link
   }