fix: bump iavl to v1.2.8 (#1142 fastnode cache race) (#168)

Author: traviolus

go.mod

@@ -266,7 +266,7 @@ replace (
 )
 
 // indirect custom dependencies
-require github.com/cosmos/iavl v1.2.6 // indirect
+require github.com/cosmos/iavl v1.2.8 // indirect
 
 // initia custom
 // use custom version for

go.sum

@@ -978,8 +978,8 @@ github.com/cosmos/gogogateway v1.2.0/go.mod h1:iQpLkGWxYcnCdz5iAdLcRBSw3h7NXeOkZ
 github.com/cosmos/gogoproto v1.4.2/go.mod h1:cLxOsn1ljAHSV527CHOtaIP91kK6cCrZETRBrkzItWU=
 github.com/cosmos/gogoproto v1.7.0 h1:79USr0oyXAbxg3rspGh/m4SWNyoz/GLaAh0QlCe2fro=
 github.com/cosmos/gogoproto v1.7.0/go.mod h1:yWChEv5IUEYURQasfyBW5ffkMHR/90hiHgbNgrtp4j0=
-github.com/cosmos/iavl v1.2.6 h1:Hs3LndJbkIB+rEvToKJFXZvKo6Vy0Ex1SJ54hhtioIs=
-github.com/cosmos/iavl v1.2.6/go.mod h1:GiM43q0pB+uG53mLxLDzimxM9l/5N9UuSY3/D0huuVw=
+github.com/cosmos/iavl v1.2.8 h1:55F96BGUJ7KT7h+Ky/cEqS+pEvhFqsU4O8Th3F0N1js=
+github.com/cosmos/iavl v1.2.8/go.mod h1:FRHN4tO+6crf0p2zsqye+nAbsMgiwdkxpWm18DyP6+Y=
 github.com/cosmos/ibc-apps/middleware/packet-forward-middleware/v8 v8.2.0 h1:rM+S14DFiqmu6Rc3PuhvWqwywPsnt/CbIslSnBftPFs=
 github.com/cosmos/ibc-apps/middleware/packet-forward-middleware/v8 v8.2.0/go.mod h1:O5H9Ic3Pe6cmJn1eqlj5N48sLb8WQ1VWmDP4/11g/4E=
 github.com/cosmos/ibc-apps/modules/rate-limiting/v8 v8.0.0 h1:AQO9NIAP3RFqvBCj7IqM/V1LCxmuvcvGUdu0RIEz/c0=