PNG file optimizer

Current versions:


Formula history

Zhiming Wangoptipng: fix on 10.13 (#15419)
Miguel Araújooptipng: fix audit --warning
Mike McQuaidUse hash rockets again. (#5177)
Mike McQuaidUse Ruby 1.9+ symbol hash keys in all formulae. (#4942)
Kyungdahm Yunoptipng 0.7.6
Viktor Szakatsoptipng: use secure url in comment
Tomasz Pajoroptipng: audit fixes
Nikolaus WittensteinAdd descriptions to all remaining homebrew packages
Xu Chengoptipng: add test
Xu Chengoptipng: modernize
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