Update core template

Signed-off-by: Frederic.Pillon <[email protected]>

Author: fpistm

STM32/src/templates/package_core_index.json

@@ -14,17 +14,17 @@
             {
               "packager": "STM32",
               "name": "arm-none-eabi-gcc",
-              "version": "6-2017-q2-update"
+              "version": "8-2018-q4-major"
             },
             {
               "packager": "STM32",
               "name": "STM32Tools",
-              "version": "1.2.1"
+              "version": "1.3.0"
             },
             {
               "packager": "STM32",
               "name": "CMSIS",
-              "version": "5.3.0"
+              "version": "5.5.1"
             }
           ]
         }