Add sig for Error

sue445 · sue445 · commit d2f52670e0df · 2024-10-13T13:24:52.000+09:00
diff --git a/sig/ruby_header_parser.rbs b/sig/ruby_header_parser.rbs
@@ -1,4 +1,7 @@
 module RubyHeaderParser
+  class Error < StandardError
+  end
+
   VERSION: String
   # See the writing guide of rbs: https://github.com/ruby/rbs#guides
 end
