Bump version to 1.4.2

Author: ivankravets

platform.json

@@ -12,7 +12,7 @@
     "type": "git",
     "url": "https://github.com/platformio/platform-linux_arm.git"
   },
-  "version": "1.4.1",
+  "version": "1.4.2",
   "packageRepositories": [
     "https://dl.bintray.com/platformio/dl-packages/manifest.json",
     "https://sourceforge.net/projects/platformio-storage/files/packages/manifest.json/download",