[Brew] Add font and carabiner elements

tasks/brewfiles/essential

@@ -1,4 +1,5 @@
 tap 'thoughtbot/formulae'
+tap 'caskroom/fonts'
 
 brew 'cask'
 brew 'coreutils'
@@ -21,6 +22,7 @@ brew 'tmux'
 brew 'wget'
 brew 'zsh'
 
+cask 'font-source-code-pro'
 cask 'alfred'
 cask 'flash'
 cask 'flycut'
@@ -29,8 +31,7 @@ cask 'google-hangouts'
 cask 'gpgtools'
 cask 'iterm2'
 cask 'java'
-cask 'karabiner'
-cask 'macpass'
+cask 'karabiner-elements'
 cask 'slate'
 cask 'sparkleshare'
 cask 'spotify'