finder use specify eval_string

lib/tallty_import_export/import.rb

@@ -90,9 +90,7 @@ module TalltyImportExport
           h[header[:json]][k] = val
         elsif header[:finder]
           $SAFE = 2
-          eval_string = header[:finder] + '(val)'
-          eval_val = eval eval_string
-          h[k.to_sym] = eval_val
+          h[k.to_sym] = eval header[:finder]
         else
           h[k.to_sym] = val
         end

lib/tallty_import_export/version.rb

 module TalltyImportExport
-  VERSION = "1.0.18"
+  VERSION = "1.0.19"
 end