Bump capybara from 3.29.0 to 3.32.2 in /backend

Bumps [capybara](https://github.com/teamcapybara/capybara) from 3.29.0 to 3.32.2.
- [Release notes](https://github.com/teamcapybara/capybara/releases)
- [Changelog](https://github.com/teamcapybara/capybara/blob/master/History.md)
- [Commits](teamcapybara/capybara@3.29.0...3.32.2)

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

Author: dependabot-preview[bot]

backend/Gemfile.lock

@@ -63,7 +63,7 @@ GEM
       msgpack (~> 1.0)
     builder (3.2.3)
     byebug (11.0.1)
-    capybara (3.29.0)
+    capybara (3.32.2)
       addressable
       mini_mime (>= 0.1.3)
       nokogiri (~> 1.8)
@@ -103,10 +103,10 @@ GEM
     nokogiri (1.10.9)
       mini_portile2 (~> 2.4.0)
     pg (1.1.4)
-    public_suffix (4.0.1)
+    public_suffix (4.0.5)
     puma (4.3.3)
       nio4r (~> 2.0)
-    rack (2.0.8)
+    rack (2.2.2)
     rack-cors (1.1.1)
       rack (>= 2.0.0)
     rack-test (1.1.0)
@@ -141,7 +141,7 @@ GEM
     rb-fsevent (0.10.3)
     rb-inotify (0.10.0)
       ffi (~> 1.0)
-    regexp_parser (1.6.0)
+    regexp_parser (1.7.0)
     rubyzip (2.0.0)
     selenium-webdriver (3.142.5)
       childprocess (>= 0.5, < 3.0)