Add Vysor Latest (#29487)

* Add Vysor Latest

Vysor was only available through Chrome app store, but a beta version
built on electron was published through a Google+ post from the author
(can be read here:
https://plus.google.com/110558071969009568835/posts/Ub7QKu2Pddu )

* Changed Vysor cask source to Github

Previously used the very unofficial source from his google+ post, but
now we use his Github source directly after learning one existed.

Casks/vysor.rb

@@ -0,0 +1,22 @@
+cask 'vysor' do
+  version '1.6.7'
+  sha256 'c75f6c3f1e5b84141686c4214da91a409992f6c937521e821a77d83d6b548a2d'
+
+  # github.com/koush/vysor.io was verified as official when first introduced to the cask
+  url "https://github.com/koush/vysor.io/releases/download/v#{version}/Vysor-mac.zip"
+  appcast 'https://github.com/koush/vysor.io/releases.atom',
+          checkpoint: '0d2caa485689d7473f12c206dc29f93837facca857a60276e44b632dfa290766'
+  name 'Vysor'
+  homepage 'https://www.vysor.io'
+
+  app 'Vysor.app'
+
+  zap delete: [
+                '~/Library/Application Support/Vysor',
+                '~/Library/Caches/com.electron.vysor',
+                '~/Library/Caches/com.electron.vysor.ShipIt',
+                '~/Library/Preferences/com.electron.vysor.plist',
+                '~/Library/Preferences/com.electron.vysor.helper.plist',
+                '~/Library/Saved Application State/com.electron.vysor.savedState',
+              ]
+end