fixes compilation warnings on Elixir 1.10 and 1.11#9

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jaimeiniesta wants to merge 2 commits intomazingstudio:masterfrom jaimeiniesta:fix-warnings

+67-67

Commits on May 26, 2021

fixes warnings about @doc attribute is always discarded for private
jaimeiniesta
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Commits on May 27, 2021

upgrades to Elixir 1.11, fixing warnings about docs
jaimeiniesta
committed