Bump ex_doc from 0.18.4 to 0.20.2#2

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dependabot-preview[bot] wants to merge 2 commits intomasterfrom

dependabot/hex/ex_doc-0.20.2

Commits on Sep 17, 2020

Work with the version of Ecto we use
markolson
authored

Commits on Nov 9, 2020

Bump ex_doc from 0.18.4 to 0.20.2
dependabot-preview[bot]
authored