Bump signet from 0.11.0 to 0.13.0

[dependabot-preview[bot]]

Bumps signet from 0.11.0 to 0.13.0.

Release notes

Sourced from signet's releases.

Release signet 0.13.0

• Support Faraday 1.x

Changelog

Sourced from signet's changelog.

0.13.0 / 2020-02-24

• Support Faraday 1.x

0.12.0 / 2019-10-08

• This version now requires Ruby 2.4.
• Support array values of the "aud" field.
• Normalize the version constant to match related gems.

Commits

• d3c55dc Release signet 0.13.0
• 23d7335 feat: support Faraday 1.x
• 3ce8da4 add v to version url (#157)
• 05e3f52 chore: run linkinator on merges to master (#154)
• 3e041a5 chore: use docker images from google-cloud-ruby (#156)
• d2cbe63 chore: remove travis build badge (#155)
• e05623e chore: upload docs to googleapis.dev on release (#153)
• 8dc8ffd Update Gemfile with dependencies for release (#151)
• 4b7a9da fix: Avoid rakefile task collisions, and fix tag format
• 732d8cc Fix missing require in rakefile (#149)
• Additional commits viewable in compare view

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[dependabot-preview[bot]]

Superseded by #233.