chore(deps): update dependency ostruct to v0.6.3 (#16)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

Gemfile.lock

@@ -178,7 +178,7 @@ GEM
     nkf (0.2.0)
     optparse (0.8.1)
     os (1.1.4)
-    ostruct (0.6.1)
+    ostruct (0.6.3)
     plist (3.7.2)
     public_suffix (7.0.0)
     rake (13.3.1)