Bump email_spec from 2.1.1 to 2.2.0

Bumps [email_spec](https://github.com/email-spec/email-spec) from 2.1.1 to 2.2.0.
- [Release notes](https://github.com/email-spec/email-spec/releases)
- [Changelog](https://github.com/email-spec/email-spec/blob/master/Changelog.md)
- [Commits](email-spec/email-spec@v2.1.1...v2.2.0)

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

Gemfile

@@ -79,7 +79,7 @@ group :test do
   gem "capybara", "~> 2.17.0"
   gem "coveralls", "~> 0.8.22", require: false
   gem "database_cleaner", "~> 1.7.0"
-  gem "email_spec", "~> 2.1.0"
+  gem "email_spec", "~> 2.2.0"
   gem "rspec-rails", "~> 3.8"
   gem "selenium-webdriver", "~> 3.141"
 end

Gemfile.lock

@@ -50,7 +50,7 @@ GEM
     acts-as-taggable-on (5.0.0)
       activerecord (>= 4.2.8)
     acts_as_votable (0.11.1)
-    addressable (2.5.2)
+    addressable (2.6.0)
       public_suffix (>= 2.0.2, < 4.0)
     ahoy_matey (1.6.0)
       addressable
@@ -160,10 +160,10 @@ GEM
       devise (>= 4.0)
     diff-lcs (1.3)
     docile (1.3.1)
-    email_spec (2.1.1)
+    email_spec (2.2.0)
       htmlentities (~> 4.3.3)
       launchy (~> 2.1)
-      mail (~> 2.6)
+      mail (~> 2.7)
     erb_lint (0.0.28)
       activesupport
       better_html (~> 1.0.7)
@@ -550,7 +550,7 @@ DEPENDENCIES
   devise (~> 4.6.0)
   devise-async (~> 1.0.0)
   devise_security_extension!
-  email_spec (~> 2.1.0)
+  email_spec (~> 2.2.0)
   erb_lint
   factory_bot_rails (~> 4.8.2)
   faker (~> 1.8.7)