Implement a sample upgrade module

[egonspace]

Summary

Once the chain starts, it becomes very difficult to upgrade the node implementation. Once the chain starts, the chain upgrade must be made through the upgrade module from that point on. Currently, there is no upgrade implementation in lbm-sdk, so there is no upgrade experience to us, but it is important to implement it once as a sample to gain experience in upgrade behavior.

The implementation of this sample aims to be as follows.

• Converting the data stored in the keeper into a new type
• Activate the upgrade module without halting the chain
• Implement a base framework to register a new gov proposal without an upgrade module

Problem Definition

Proposal

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