Release v0.3.4
ink! Stabilize seal_debug_message
after pr use-ink/ink#902. commit(use-ink/ink@fdae16d)
Thus, if developer use the ink! after this commit, the pallet-contracts
should support stable seal_debug_message
either. please choose europa v0.3.4.
Otherwise, if developer use the ink! before this commit (e.g. use 3.0.0-rc4 from crates.io), please choose the europa v0.3.3