v2.1.4 - upgrades internals to sdkv50

also has a lot more CI tools.

we upgraded to v50 sdk. this is mainly due to the upgrades in proposals which was having issues where some chains were failing some of the checks on the older v45 sdk.

biggest pain was the oracles, as the chains using them haven't upgraded to v50, and building with them caused a lot of issues.

big thanks to @faddat who cleaned up all the go-imports and added CI too ;-)