dependency: bump puma from 5.3.1 to 5.3.2

Bumps puma from 5.3.1 to 5.3.2.

Changelog

Sourced from puma's changelog.

5.3.2 / 2021-05-21

• Bugfixes
  • Gracefully handle Rack not accepting CLI options (#2630, #2626)
  • Fix sigterm misbehavior (#2629)
  • Improvements to keepalive-connection shedding (#2628)

Commits

• f4766ce 5.3.2
• e5f04b4 Actions - bypass RuboCop on MRI Ruby head/master, Psych 4.0 issue
• f9e9102 Gracefully handle Rack not accepting CLI options (#2630)
• 04e4b1a Fix sigterm misbehavior (#2629)
• 8c211dc Update docs for low_latency option and fix parsing issue (#2631)
• ffa5d56 Improvements to keepalive-connection shedding (#2628)
• See full diff in compare view

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