message: Increment index version
diff: @@ -504,7 +504,7 @@ MAKE_REFLECT_STRUCT(IndexInclude, line, resolved_path);
  struct IndexFile {
  IdCache id_cache;
  - static constexpr int kCurrentVersion = 2;
  + static constexpr int kCurrentVersion = 3;
  int version = 0;
  std::string path;
  