Release v0.10.5

[ejfitzgerald]

This issue tracks the progress for the v0.10.5 release for the fetchd ledger.

Tasks

• [x] #247
• [x] #246
• [x] https://github.com/fetchai/cosmos-sdk/pull/131

Release

• [x] Create release candidate
• [x] Test upgrade procedure on testnet
• [x] Create release version
• [x] Submit governance proposal for upgrade