Prep for v1.9.0 (#3251)

Project.toml

@@ -1,7 +1,7 @@
 name = "JuMP"
 uuid = "4076af6c-e467-56ae-b986-b466b2749572"
 repo = "https://github.com/jump-dev/JuMP.jl.git"
-version = "1.8.2"
+version = "1.9.0"
 
 [deps]
 LinearAlgebra = "37e2e46d-f89d-539d-b4ee-838fcccc9c8e"

README.md

@@ -10,7 +10,7 @@ embedded in [Julia](https://julialang.org/). You can find out more about us by
 visiting [jump.dev](https://jump.dev).
 
 
-**Latest Release**: [![version](https://juliahub.com/docs/JuMP/DmXqY/1.8.1/version.svg)](https://juliahub.com/ui/Packages/JuMP/DmXqY/1.8.2) (`release-1.0` branch):
+**Latest Release**: [![version](https://juliahub.com/docs/JuMP/DmXqY/1.9.0/version.svg)](https://juliahub.com/ui/Packages/JuMP/DmXqY/1.9.0) (`release-1.0` branch):
   * Installation via the Julia package manager:
     * `import Pkg; Pkg.add("JuMP")`
   * Get help:

docs/src/changelog.md

@@ -7,6 +7,41 @@ CurrentModule = JuMP
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## Version 1.9.0 (March 7, 2023)
+
+### Added
+
+ - Added [`get_attribute`](@ref) and [`set_attribute`](@ref). These replace
+   [`get_optimizer_attribute`](@ref) and [`set_optimizer_attribute`](@ref),
+   although the `_optimizer_` functions remain for backward compatibility. (#3219)
+ - Added [`set_start_values`](@ref) for setting all supported start values in a
+   model (#3238)
+ - Add [`remove_bridge`](@ref) and [`print_active_bridges`](@ref) (#3259)
+
+### Fixed
+
+ - The matrix returned by a variable in [`HermitianPSDCone`](@ref) is now a
+   `LinearAlgebra.Hermitian` matrix. This is potentially breaking if you have
+   written code to assume the return is a `Matrix`. (#3245) (#3246)
+ - Fixed missing support for `Base.isreal` of expressions (#3252)
+
+### Other
+
+ - Fixed a thread safety issue in the [Parallelism](@ref) tutorial (#3240)
+   (#3243)
+ - Improved the error message when unsupported operators are used in `@NL`
+   macros (#3236)
+ - Clarified the documentation to say that matrices in [`HermitianPSDCone`](@ref)
+   must be `LinearAlgebra.Hermitian` (#3241)
+ - Minor style fixes to internal macro code (#3247)
+ - Add [Quantum state discrimination](@ref) tutorial (#3250)
+ - Improve error message when `begin...end` not passed to plural macros (#3255)
+ - Document how to register function with varying number of input arguments
+   (#3258)
+ - Tidy tests by removing unneeded `JuMP.` prefixes (#3260)
+ - Clarified the introduction to the [Complex number support](@ref) tutorial (#3262)
+ - Fixed typos in the Documentation (#3263) (#3266) (#3268) (#3269)
+
 ## Version 1.8.2 (February 27, 2023)
 
 ### Fixed