Update extension version to 1.2.0

Signed-off-by: Jens Reinecke <jens.reinecke@arm.com>

Author: jreineckearm

package.json

@@ -2,7 +2,7 @@
   "name": "vscode-cmsis-debugger",
   "displayName": "Arm CMSIS Debugger",
   "description": "Run and debug embedded and IoT projects on Arm Cortex-M single or multi core devices. Connects via pyOCD to CMSIS-DAP or other GDB servers.",
-  "version": "1.2.0-rc0",
+  "version": "1.2.0",
   "preview": false,
   "publisher": "Arm",
   "author": "Jens Reinecke <jens.reinecke@arm.com>",