chore(deps): update dependency postgrex to v0.20.0

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
postgrex (source)	prod	minor	0.19.3 -> 0.20.0

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Release Notes

elixir-ecto/postgrex (postgrex)

v0.20.0

Compare Source

• Deprecations

  • Deprecate :search_path and use :parameters option instead

• Bug fixes

  • Ensure Duration type returns same units as Postgrex.Interval
  • Call disconnect on protocol when reconnecting in Postgrex.ReplicationConnection
  • Call disconnect only if there is protocol in Postgrex.SimpleConnection

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