User reports that latest hex reports V1.2

[borpin]

A user on the community has reported that the 'latest' version reports itself as V1.2 when used.

https://community.openenergymonitor.org/t/emontx-stops-sending-data-no-led-activity-until-reboot/12529/11

[borpin]

I think this is because the platformio.ini has not been updated to match the release tag.

EmonTxV3CM/platformio.ini

Line 5 in 03e8615

build_flags = -D BUILD_TAG=1.2.0

[borpin]

Closed by #12 but new releases should update the ini file as part of the release process.