Gemfile.lock in mailtrap-1.1.1 vs Gemfile.lock in mailtrap-1.2.0

@@ -1,15 +1,19 @@
 PATH
   remote: .
   specs:
-    mailtrap (1.1.1)
+    mailtrap (1.2.0)
 
 GEM
   remote: https://rubygems.org/
   specs:
     addressable (2.8.0)
       public_suffix (>= 2.0.2, < 5.0)
+    appraisal (2.4.1)
+      bundler
+      rake
+      thor (>= 0.14.0)
     ast (2.4.2)
     crack (0.4.5)
       rexml
     diff-lcs (1.5.0)
     hashdiff (1.0.1)
@@ -53,10 +57,11 @@
     rubocop-ast (1.18.0)
       parser (>= 3.1.1.0)
     rubocop-rspec (2.11.1)
       rubocop (~> 1.19)
     ruby-progressbar (1.11.0)
+    thor (1.2.1)
     unicode-display_width (2.1.0)
     vcr (6.1.0)
     webmock (3.14.0)
       addressable (>= 2.8.0)
       crack (>= 0.3.2)
@@ -64,9 +69,10 @@
 
 PLATFORMS
   ruby
 
 DEPENDENCIES
+  appraisal
   mail
   mailtrap!
   net-smtp
   rake (~> 13.0)
   rspec (~> 3.0)