Mathlib v3 is deprecated. Go to Mathlib v4

Commit 2018-12-17 10:50 53b08c1c

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fix(*): untangle dependency hierarchy

Estimated changes

deleted def option.filter
deleted def option.guard
deleted def option.iget
deleted theorem option.iget_some
deleted def option.lift_or_get
deleted theorem option.mem_def
deleted theorem option.mem_to_list
deleted inductive option.rel
deleted theorem option.some_inj
deleted def option.to_list
added def option.filter
added def option.guard
added def option.iget
added theorem option.iget_some
added theorem option.mem_def
added theorem option.mem_to_list
added inductive option.rel
added theorem option.some_inj
added def option.to_list