Bump pry from 0.14.2 to 0.15.0

Bumps [pry](https://github.com/pry/pry) from 0.14.2 to 0.15.0.
- [Release notes](https://github.com/pry/pry/releases)
- [Changelog](https://github.com/pry/pry/blob/master/CHANGELOG.md)
- [Commits](https://github.com/pry/pry/compare/v0.14.2...v0.15.0)

---
updated-dependencies:
- dependency-name: pry
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Gemfile.lock

@@ -7,13 +7,13 @@ GEM
     flickr-login (0.0.3)
       oauth
     flickraw (0.9.10)
-    method_source (1.0.0)
+    method_source (1.1.0)
     mini_portile2 (2.8.7)
     multi_json (1.15.0)
     mustermann (3.0.0)
       ruby2_keywords (~> 0.0.1)
     oauth (0.5.6)
-    pry (0.14.2)
+    pry (0.15.0)
       coderay (~> 1.1)
       method_source (~> 1.0)
     pry-doc (1.5.0)