Update webmock requirement from = 3.7.0 to = 3.13.0

Updates the requirements on webmock to permit the latest version.

Changelog

Sourced from webmock's changelog.

3.13.0

• Support http.rb 5.x

  Thanks to Will Storey

3.12.2

• Fixed em-http-request adapter to avoid calling middleware twice.

  Thanks to Alex Vondrak

3.12.1

• Fixed handling of URIs with IPv6 addresses with square brackets when in Net::HTTP adapter.

  Thanks to Johanna Hartmann

3.12.0

• Added support for handling custom JSON and XML content types e.g. 'application/vnd.api+json'

3.11.3

• Fixed async-http adapter to only considered requests as real if they are real.

  Thanks to Thanks to Tony Schneider and Samuel Williams

3.11.2

• Fix for Manticore streaming mode

  Thanks to Oleksiy Kovyrin

3.11.1

• Compatibility with async-http 0.54+

  Thanks to Jun Jiang

3.11.0

• Added support for features in http.rb adapter.

  Thanks to Carl (ce07c3)

3.10.0

• Added option to global stubs to have lower priority than local stubs.

... (truncated)

Commits

• 69e4ab6 Version 3.13.0
• 5e011c8 Merge pull request #941 from horgh/horgh/http-rb-5
• 3e81062 Support http.rb 5.x
• ab85203 Replaced Travis badge with GitHub actions badge.
• 4d37538 Version 3.11.2
• 6967c20 Merge branch 'ajvondt push origin master
• 2b87ab3 Merge branch 'master' of github.com:ajvondrak/webmock into ajvondrak-master
• 7437229 Removed trailing space.
• d06f87f HTTP/2 doesn’t have dot in version number.
• 443a4c7 Avoid redundantly calling em-http-request middleware
• Additional commits viewable in compare view