Bump puma from 3.11.0 to 3.12.6#5

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dependabot[bot] wants to merge 4 commits intomasterfrom

dependabot/bundler/puma-3.12.6

Commits on Jan 12, 2018

Adds nested namespace
charusat09
committed

Commits on Jan 16, 2018

Adds Demo for Nested Resources
charusat09
committed

Commits on Nov 27, 2020