Bump excon from 0.68.0 to 0.71.0

Bumps [excon](https://github.com/excon/excon) from 0.68.0 to 0.71.0.
- [Release notes](https://github.com/excon/excon/releases)
- [Changelog](https://github.com/excon/excon/blob/master/changelog.txt)
- [Commits](https://github.com/excon/excon/compare/v0.68.0...v0.71.0)
Signed-off-by: dependabot[bot] <support@github.com>

Gemfile.lock

@@ -277,7 +277,7 @@ GEM
     equalizer (0.0.11)
     equatable (0.6.1)
     erubis (2.7.0)
-    excon (0.68.0)
+    excon (0.71.0)
     faraday (0.17.0)
       multipart-post (>= 1.2, < 3)
     faraday-cookie_jar (0.0.6)