Merge #70: Use released simplicity and release

dfdc17e bump version 0.2.0 -> 0.3.0 and update CHANGELOG (Riccardo Casatta)
1cf86d3 use released simplicity 0.2.0 (Riccardo Casatta)

Pull request description:

ACKs for top commit:
  apoelstra:
    ACK dfdc17e

Tree-SHA512: e8546ebbf09ee74fef8e085354f1c56c5d66fe4407cec9e7fb88cbf130126c6ff84107bfd6e2ab2156dd7fb2970402ca0ff736fe97d0ea0a172424c3908f180c

Author: apoelstra

CHANGELOG.md

@@ -1,3 +1,10 @@
+# 0.3.0 - Jan 30, 2024
+
+- Add simplicity
+- Use rust-bitcoin 0.31.0
+- [elip150](https://github.com/ElementsProject/ELIPs/blob/main/elip-0150.mediawiki)
+- [elip151](https://github.com/ElementsProject/ELIPs/blob/main/elip-0151.mediawiki)
+
 # 0.2.0 - June 15, 2023
 
 - Still rapid iteration, very unstable.

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "elements-miniscript"
-version = "0.2.0"
+version = "0.3.0"
 authors = ["Andrew Poelstra <apoelstra@wpsoftware.net>, Sanket Kanjalkar <sanket1729@gmail.com>"]
 repository = "https://github.com/ElementsProject/elements-miniscript"
 description = "Elements Miniscript: Miniscript, but for elements"
@@ -22,7 +22,7 @@ base64 = ["bitcoin/base64"]
 bitcoin = "0.31.0"
 elements = "0.24.0"
 bitcoin-miniscript = { package = "miniscript", version = "11.0" }
-simplicity = { git = "https://github.com/BlockstreamResearch/rust-simplicity", rev = "39fe6d7533b06001e9954fa08df34a1052702caf", optional = true }
+simplicity = { package = "simplicity-lang", version = "0.2.0", optional = true }
 
 # Do NOT use this as a feature! Use the `serde` feature instead.
 actual-serde = { package = "serde", version = "1.0", optional = true }