dep: bump puma from 5.1.0 to 5.1.1

Bumps puma from 5.1.0 to 5.1.1.

Release notes

Sourced from puma's releases.

5.1.1

• Bugfixes
  • Fix over eager matching against banned header names (#2510)

Changelog

Sourced from puma's changelog.

5.1.1 / 2020-12-10

• Bugfixes
  • Fix over eager matching against banned header names (#2510)

Commits

• 607c319 5.1.1
• 5cf3d7c Make illegal header matching more stringent (#2510)
• See full diff in compare view