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Commit 2020-11-04 00:20 23a2767d

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feat(category_theory/yoneda): type level yoneda equivalence (#4889) Broken off from #4608.

Estimated changes

Modified src/category_theory/yoneda.lean

added def category_theory.yoneda_equiv

added theorem category_theory.yoneda_equiv_apply

added theorem category_theory.yoneda_equiv_naturality

added theorem category_theory.yoneda_equiv_symm_app_apply