Update DeviceOS v0.5.4 -> v0.7.0

[sonyccd]

We need to update the OS as there are many bugs that have been fixed and the Serial Logging system is only available in this version and higher. See the link below for release info.
https://github.com/particle-iot/firmware/releases/tag/v0.6.0
Note we are upgrading to v0.6.4 as it will be the needed version to move to v0.7.0 in the future

v0.6.0 features that matter:

• Logging library for flexible system and application logging
• [Electron] Reduced data consumption connecting to the cloud with deep sleep. (See the Docs for how to gain the full data reduction.)
• [Electron] Firmware Reset now available.
• [Electron] now allows OTA bootloader updates
• Added Daylight Saving Time support

[sonyccd]

⚠️ Once this is done it is a reversion wall! We can not downgrade over the air!

We will be able to upgrade to newer versions but not older version.

[sonyccd]

I have updated mine to 0.7.0 and everything seems to be working great