Bump webdrivers from 3.8.0 to 3.9.1 (#2814) [ci skip]

Bumps [webdrivers](https://github.com/titusfortner/webdrivers) from 3.8.0 to 3.9.1.
- [Release notes](https://github.com/titusfortner/webdrivers/releases)
- [Changelog](https://github.com/titusfortner/webdrivers/blob/master/CHANGELOG.md)
- [Commits](https://github.com/titusfortner/webdrivers/compare/v3.8.0...v3.9.1)

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

Gemfile

@@ -149,7 +149,7 @@ group :test do
   gem "test-prof", "~> 0.7" # Ruby Tests Profiling Toolbox
   gem "timecop", "~> 0.9" # A gem providing "time travel" and "time freezing" capabilities, making it dead simple to test time-dependent code
   gem "vcr", "~> 4.0" # Record your test suite's HTTP interactions and replay them during future test runs for fast, deterministic, accurate tests
-  gem "webdrivers", "~> 3.7" # Run Selenium tests more easily with install and updates for all supported webdrivers
+  gem "webdrivers", "~> 3.9" # Run Selenium tests more easily with install and updates for all supported webdrivers
   gem "webmock", "~> 3.5" # WebMock allows stubbing HTTP requests and setting expectations on HTTP requests
   gem "zonebie", "~> 0.6.1" # Runs your tests in a random timezone
 end

Gemfile.lock

@@ -686,7 +686,7 @@ GEM
     sdoc (1.0.0)
       rdoc (>= 5.0)
     selectize-rails (0.12.6)
-    selenium-webdriver (3.142.0)
+    selenium-webdriver (3.142.2)
       childprocess (>= 0.5, < 2.0)
       rubyzip (~> 1.2, >= 1.2.2)
     serviceworker-rails (0.5.5)
@@ -789,7 +789,7 @@ GEM
       activemodel (>= 5.0)
       bindex (>= 0.4.0)
       railties (>= 5.0)
-    webdrivers (3.8.0)
+    webdrivers (3.9.1)
       nokogiri (~> 1.6)
       rubyzip (~> 1.0)
       selenium-webdriver (~> 3.0)
@@ -946,7 +946,7 @@ DEPENDENCIES
   validate_url (~> 1.0)
   vcr (~> 4.0)
   web-console (~> 3.7)
-  webdrivers (~> 3.7)
+  webdrivers (~> 3.9)
   webmock (~> 3.5)
   webpacker (~> 3.5)
   webpush (~> 0.3)