updated iterm2-nightly (latest) (#2530)

* updated iterm2-nightly (latest)

* Fixed style check failed

Casks/iterm2-nightly.rb

@@ -1,8 +1,8 @@
 cask 'iterm2-nightly' do
-  version '3.0.3'
-  sha256 '3585a83abfdec1a54bd4ff61786099328aa3f3cae471227d54a2a98926e71b6f'
+  version :latest
+  sha256 :no_check
 
-  url "http://www.iterm2.com/nightly/iTerm2-#{version.dots_to_underscores}.zip"
+  url 'https://www.iterm2.com/nightly/latest'
   appcast 'https://iterm2.com/appcasts/nightly.xml',
           checkpoint: '083908c06413f4aa9b12aa9945049401bf56e48e8755849c6a20d6b3288382f1'
   name 'iTerm2'
@@ -11,5 +11,10 @@ cask 'iterm2-nightly' do
 
   app 'iTerm.app'
 
-  zap delete: '~/Library/Preferences/com.googlecode.iterm2.plist'
+  zap delete: [
+                '~/Library/Preferences/com.googlecode.iterm2.plist',
+                '~/Library/Caches/com.googlecode.iterm2',
+                '~/Library/Application Support/iTerm',
+                '~/Library/Application Support/iTerm2',
+              ]
 end