Add Rust beta + Python beta to the test matrix (#1220)

* Add CI covering beta versions of Rust and Python

* Update comment

* Fix yaml

* Yet another trial-and-error commit

* Use correct python-dev syntax

* Remove SciPy as a development dependency

* Ignore multi-graph handling code

* Try to not install Pilow for 3.13 beta

Author: IvanIsCoding

.github/workflows/main.yml

@@ -70,6 +70,11 @@ jobs:
             python-version: 3.8
             platform: { os: "ubuntu-latest", python-architecture: "x64", rust-target: "x86_64-unknown-linux-gnu" }
             msrv: "MSRV"
+          # Test future versions of Rust and Python
+          - rust: beta
+            python-version: "3.13-dev"
+            platform: { os: "ubuntu-latest", python-architecture: "x64", rust-target: "x86_64-unknown-linux-gnu" }
+            msrv: "Beta"
         # Exclude python 3.8 and 3.9 on arm64 until actions/setup-python#808 is resolved
         exclude:
           - platform: {os: "macOS-14", python-architecture: "arm64", rust-target: "aarch64-apple-darwin" }

constraints.txt

@@ -1,4 +1,4 @@
 decorator==4.4.2
 importlib-metadata==4.13.0;python_version<'3.8'
-pillow<10.0.0
+pillow<10.0.0;python_version<'3.13'
 lxml==5.1.1