Merge #23: chore: bump to v0.3

3a826d2 chore: bump to v0.3 (志宇)

Pull request description:

Top commit has no ACKs.

Tree-SHA512: 7b5521a244fe2dbd9d60cb8e63c4f295050e4ae058e210ef6e9d62052614aecf30eb8caee8bb1b34911dc25fd2411b6bbaae9af60e776db6c5ca854d810308ca

Author: evanlinjin

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "bdk_coin_select"
-version = "0.2.0"
+version = "0.3.0"
 edition = "2018"
 #rust-version = "1.54"
 homepage = "https://bitcoindevkit.org"