Bump bdk version to 1.0.0-alpha.8

bdk_bitcoind_rpc to 0.7.0
bdk_electrum to 0.10.0
bdk_esplora to 0.10.0
bdk_file_store to 0.8.0
bdk_hwi to 0.2.0

crates/bdk/Cargo.toml

@@ -1,7 +1,7 @@
 [package]
 name = "bdk"
 homepage = "https://bitcoindevkit.org"
-version = "1.0.0-alpha.7"
+version = "1.0.0-alpha.8"
 repository = "https://github.com/bitcoindevkit/bdk"
 documentation = "https://docs.rs/bdk"
 description = "A modern, lightweight, descriptor-based wallet library"