build(deps): bump excon from 1.2.1 to 1.2.2

Bumps [excon](https://github.com/excon/excon) from 1.2.1 to 1.2.2.
- [Changelog](https://github.com/excon/excon/blob/master/changelog.txt)
- [Commits](excon/excon@v1.2.1...v1.2.2)

---
updated-dependencies:
- dependency-name: excon
  dependency-type: indirect
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>

Gemfile.lock

@@ -7,7 +7,7 @@ GEM
     docker-api (2.4.0)
       excon (>= 0.64.0)
       multi_json
-    excon (1.2.1)
+    excon (1.2.2)
     method_source (1.1.0)
     multi_json (1.15.0)
     net-scp (4.0.0)