Add actionmailer test dependency to fix test suite (#92)

Author: rmacklin

Gemfile

@@ -4,3 +4,7 @@ gemspec
 
 gem "sqlite3"
 gem "debug", ">= 1.0.0"
+
+group :test do
+  gem "actionmailer", ">= 6.0.0"
+end

Gemfile.lock

@@ -7,6 +7,13 @@ PATH
 GEM
   remote: https://rubygems.org/
   specs:
+    actionmailer (6.1.4.1)
+      actionpack (= 6.1.4.1)
+      actionview (= 6.1.4.1)
+      activejob (= 6.1.4.1)
+      activesupport (= 6.1.4.1)
+      mail (~> 2.5, >= 2.5.4)
+      rails-dom-testing (~> 2.0)
     actionpack (6.1.4.1)
       actionview (= 6.1.4.1)
       activesupport (= 6.1.4.1)
@@ -20,6 +27,9 @@ GEM
       erubi (~> 1.4)
       rails-dom-testing (~> 2.0)
       rails-html-sanitizer (~> 1.1, >= 1.2.0)
+    activejob (6.1.4.1)
+      activesupport (= 6.1.4.1)
+      globalid (>= 0.3.6)
     activesupport (6.1.4.1)
       concurrent-ruby (~> 1.0, >= 1.0.2)
       i18n (>= 1.6, < 2)
@@ -33,6 +43,8 @@ GEM
       irb
       reline (>= 0.2.7)
     erubi (1.10.0)
+    globalid (1.0.0)
+      activesupport (>= 5.0)
     i18n (1.8.11)
       concurrent-ruby (~> 1.0)
     io-console (0.5.9)
@@ -41,7 +53,10 @@ GEM
     loofah (2.12.0)
       crass (~> 1.0.2)
       nokogiri (>= 1.5.9)
+    mail (2.7.1)
+      mini_mime (>= 0.1.1)
     method_source (1.0.0)
+    mini_mime (1.1.2)
     mini_portile2 (2.6.1)
     minitest (5.14.4)
     nokogiri (1.12.5)
@@ -75,6 +90,7 @@ PLATFORMS
   ruby
 
 DEPENDENCIES
+  actionmailer (>= 6.0.0)
   debug (>= 1.0.0)
   sqlite3
   tailwindcss-rails!