Release v2.0.2 (based on cosmos-sdk v0.42.9)

[youngjoon-lee]

We've already bumped cosmos-sdk to v0.42.9: 8b8c0c6.

Based on it, we should release the v2.0.2 for IBC.

I've tested the IBC transfer with the Gaia localnet v5.0.5, but the following error occurred.
That error was already reported as cosmos/cosmos-sdk#9800 and was fixed at the cosmos-sdk v0.42.9.
I also tested that the IBC channel is created well with the Panacea based on the cosmos-sdk v0.42.9.

~ ❯❯❯ rly tx link transfer                                                                       tags/v2.0.1 ✭
I[2021-09-03|14:50:57.866] ✔ [testing]@{3185} - msg(0:create_client) hash(71DE75203FA458F4985A1F925705E859D615BC76312F9E9C62245B5C828D81CF) 
I[2021-09-03|14:50:59.505] ✔ [gaia]@{312} - msg(0:create_client) hash(66007BD15336B68C0CAC66834B83CBF87E85417A759C350B728C7C0AD9598B20) 
I[2021-09-03|14:50:59.505] ★ Clients created: client(07-tendermint-0) on chain[testing] and client(07-tendermint-0) on chain[gaia] 
I[2021-09-03|14:51:02.892] ✔ [testing]@{3186} - msg(0:update_client,1:connection_open_init) hash(D836C180798838365D041723470B6CD84D6A1902CA4F280890DC81A8ACF95C4E) 
I[2021-09-03|14:51:14.629] ✔ [gaia]@{315} - msg(0:update_client,1:connection_open_try) hash(3459A0969ACA673BFCB1C54B6687B321B92CC8468975B3E5DFD10C99D9FABE54) 
I[2021-09-03|14:51:33.179] ✔ [testing]@{3192} - msg(0:update_client,1:connection_open_ack) hash(D280C841B22EFF2CD556399B5DBD1A3A76AAD786F0885E7B0FDADA73B4028979) 
I[2021-09-03|14:51:39.806] ✔ [gaia]@{320} - msg(0:update_client,1:connection_open_confirm) hash(F08AD4544B3B4347AC44217F7C1C25CB72E1477A312F85C9295F17284854295B) 
I[2021-09-03|14:51:39.806] ★ Connection created: [testing]client{07-tendermint-0}conn{connection-0} -> [gaia]client{07-tendermint-0}conn{connection-0} 
I[2021-09-03|14:51:43.240] ✘ [testing]@{3194} - msg(0:update_client,1:channel_open_init) err(port:4:failed to execute message; message index: 1: channel handshake open init failed: caller does not own port capability for port ID transfer: invalid port) 
I[2021-09-03|14:51:43.240] retrying transaction...                      
I[2021-09-03|14:51:49.942] rpc error: code = InvalidArgument desc = failed to execute message; message index: 1: channel handshake open init failed: caller does not own port capability for port ID transfer: invalid port: invalid request 
I[2021-09-03|14:51:49.942] retrying transaction...                      
I[2021-09-03|14:51:59.941] rpc error: code = InvalidArgument desc = failed to execute message; message index: 1: channel handshake open init failed: caller does not own port capability for port ID transfer: invalid port: invalid request 
I[2021-09-03|14:51:59.941] retrying transaction...                      
I[2021-09-03|14:52:09.941] rpc error: code = InvalidArgument desc = failed to execute message; message index: 1: channel handshake open init failed: caller does not own port capability for port ID transfer: invalid port: invalid request 
I[2021-09-03|14:52:09.941] retrying transaction...                      
Error: ! Channel failed: [testing]chan{}port{transfer} -> [gaia]chan{}port{transfer}

One thing we should keep in mind is implementing the upgrade handler which is needed for the SoftwareUpgradeProposal.
That is, we have to take a look at the detail of SoftwareUpgradeProposal and cosmovisor deeply, before releasing the Panacea v2.0.2.

I don't think we should use the cosmos-sdk v0.44 because it contains a lot of breaking changes and it's not stable yet, I guess. It should be upgraded when we release the Panacea v3.

[gyuguen]

OK. We need to get ready to upload the version.

I will also take a deep look at SoftwareUpgradeProposal and cosmovisor.