Mathlib v3 is deprecated. Go to Mathlib v4

Commit 2022-01-12 02:31 cdd44cd7

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refactor(topology/algebra/uniform_group): Use to_additive (#11366) This PR replace the definition def topological_add_group.to_uniform_space : uniform_space G := with the definition @[to_additive] def topological_group.to_uniform_space : uniform_space G :=

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