Bump version to 1.7.0

Author: ivankravets

platform.json

@@ -17,7 +17,7 @@
     "type": "git",
     "url": "https://github.com/platformio/platform-microchippic32.git"
   },
-  "version": "1.6.1",
+  "version": "1.7.0",
   "frameworks": {
     "arduino": {
       "package": "framework-arduinomicrochippic32",