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  1. # 2.2.0
  2. * Added an option to set the starting index, useful to mitigate conflicts with
  3. third-party CSS files.
  4. * Performance improvements, including O(1) lookup of cached values rather than
  5. O(n), aborting PostCSS walk altogether when a negative index is found, and
  6. not running an optimize step if there are no z-index declarations.
  7. # 2.1.1
  8. * Fixes an issue where all positive indices before a negative index were
  9. transformed (thanks to @niccai).
  10. # 2.1.0
  11. * Now aborts early when encountering negative indices, making the transform
  12. safer overall.
  13. # 2.0.1
  14. * Improved performance of the module by sorting/deduplicating values in one pass
  15. instead of per-value (thanks to @pgilad).
  16. # 2.0.0
  17. * Upgraded to PostCSS 5.
  18. # 1.1.3
  19. * Improved performance by iterating the AST in a single pass and caching nodes for the second iteration.
  20. # 1.1.2
  21. * Documentation/metadata tweaks for plugin guidelines compatibility.
  22. # 1.1.1
  23. * Corrected dependency tree when installing from npm.
  24. # 1.1.0
  25. * Now uses the PostCSS `4.1` plugin API.
  26. # 1.0.1
  27. * Adds a JSHint config, code tidied up.
  28. # 1.0.0
  29. * Initial release.