Bump capybara from 2.18.0 to 3.0.1

Bumps [capybara](https://github.com/teamcapybara/capybara) from 2.18.0 to 3.0.1.
- [Release notes](https://github.com/teamcapybara/capybara/releases)
- [Changelog](https://github.com/teamcapybara/capybara/blob/master/History.md)
- [Commits](teamcapybara/capybara@2.18.0...3.0.1)

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

Gemfile.lock

@@ -57,13 +57,13 @@ GEM
     brakeman (4.2.1)
     builder (3.2.3)
     byebug (10.0.2)
-    capybara (2.18.0)
+    capybara (3.0.1)
       addressable
       mini_mime (>= 0.1.3)
-      nokogiri (>= 1.3.3)
-      rack (>= 1.0.0)
-      rack-test (>= 0.5.4)
-      xpath (>= 2.0, < 4.0)
+      nokogiri (~> 1.8)
+      rack (>= 1.6.0)
+      rack-test (>= 0.6.3)
+      xpath (~> 3.0)
     childprocess (0.9.0)
       ffi (~> 1.0, >= 1.0.11)
     chromedriver-helper (1.2.0)