Add to changelog and bump version to 0.4.0

CHANGELOG.md

@@ -1,5 +1,16 @@
 # News
 
+## v0.4.0 - 2024-12-10
+
+This version implements the RFC in #40 without deprecating anything. Future versions will first add deprecation warnings before removing any existing interfaces.
+
+- Eliminate all type parameters from `StateVector`, `AbstractKet`, `AbstractBra`, `AbstractOperator`, and `AbstractSuperOperator`.
+- Implement new basis checking interface consisting of `multiplicable`, `addible`, `check_multiplicable`, `check_addible`, and `@compatiblebases`.
+- Add `basis_l` and `basis_r` to get left and right bases of operators. 
+- Implement `size` for all bases and implement `getindex` for `CompositeBasis`.
+- Add method interface to existing subtypes of `Bases`: `spinnumber`, `cutoff`, `offset`.
+- Add `KetBraBasis`, `ChoiRefSysBasis`, `ChoiOutSysBasis`, and `_PauliBasis`. Note that eventually `_PauliBasis` will be renamed to `PauliBasis`.
+
 ## v0.3.7 - 2024-12-05
 
 - Rename `PauliBasis` to `NQubitBasis` with warning, and add deprecation to `equal_bases`.

Project.toml

@@ -1,7 +1,7 @@
 name = "QuantumInterface"
 uuid = "5717a53b-5d69-4fa3-b976-0bf2f97ca1e5"
 authors = ["QuantumInterface.jl contributors"]
-version = "0.3.7"
+version = "0.4.0"
 
 [deps]
 LinearAlgebra = "37e2e46d-f89d-539d-b4ee-838fcccc9c8e"