Add support for launching iTerm 2.9+

The AppleScript bridge changed at some point since 2.1. While marked as
beta, the 2.9 series is the author's recommended version to use.

The two bridges are incompatible, requiring another function and version
checks.

resources/terminal

@@ -16,7 +16,16 @@ EOF`
 function open_iterm () {
   osascript > /dev/null <<EOF
   tell application "iTerm"
+    if version < 2.9 then
       activate
+      try
+      	tell current window
+          create tab with default profile
+    	    tell the current session of current window
+            write text "bash -c \"$CMD\""
+          end tell
+      	end tell
+      on error
     	  try
           tell the first terminal
             launch session "Default Session"
@@ -32,6 +41,24 @@ function open_iterm () {
             end tell
           end tell
         end try
+      end try
+    end if
+  end tell
+EOF
+}
+
+function open_iterm2point9 () {
+  osascript > /dev/null <<EOF
+  tell application "iTerm"
+  	if version ≥ 2.9 then
+      activate
+  		tell current window
+  			create tab with default profile
+  			tell first session of current tab
+  				write text "bash -c \"$CMD\""
+  			end tell
+  		end tell
+  	end if
   end tell
 EOF
 }
@@ -48,7 +75,7 @@ EOF
 }
 
 if [ "$ITERM_EXISTS" == "true" ]; then
-  open_iterm "$@" || open_terminal "$@"
+  open_iterm2point9 "$@" || open_iterm "$@" || open_terminal "$@"
 else
   open_terminal "$@"
 fi