Bump plug_cowboy from 2.6.2 to 2.7.0

[dependabot[bot]]

Bumps plug_cowboy from 2.6.2 to 2.7.0.

Changelog

Sourced from plug_cowboy's changelog.

v2.7.0

Enhancements

• Do not allow Cowboy 2.11 due to backwards incompatible changes

Commits

• See full diff in compare view

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[dependabot[bot]]

Looks like plug_cowboy is up-to-date now, so this is no longer needed.