Add PKCE support#658

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jcdogo wants to merge 2 commits intooauthjs:devfrom dogomedia:features/pkce

+710-64

Commits on Sep 5, 2018

Updated changelog
mjsalinger
committed

Commits on Oct 8, 2020

Implement PKCE (https://tools.ietf.org/html/rfc7636 ).
jcdogo
committed