CI: Python: Installs Black for stubs formatting

.github/workflows/artifacts.yml

@@ -180,7 +180,7 @@ jobs:
           python-version: "3.10"
           cache: pip
           cache-dependency-path: '**/requirements.dev.txt'
-      - run: pip install "maturin~=0.14.0"
+      - run: pip install -r python/requirements.dev.txt
       - run: maturin build --release -m python/Cargo.toml --features abi3
       - run: pip install --no-index --find-links=target/wheels/ pyoxigraph
       - run: rm -r target/wheels
@@ -215,7 +215,7 @@ jobs:
           cache: pip
           cache-dependency-path: '**/requirements.dev.txt'
       - run: Remove-Item -LiteralPath "C:\msys64\" -Force -Recurse
-      - run: pip install "maturin~=0.14.0"
+      - run: pip install -r python/requirements.dev.txt
       - run: maturin build --release -m python/Cargo.toml --features abi3
       - run: pip install --no-index --find-links=target/wheels/ pyoxigraph
       - run: rm -r target/wheels

.github/workflows/manylinux_build.sh

@@ -10,7 +10,7 @@ export PATH="${PATH}:/opt/python/cp37-cp37m/bin:/opt/python/cp38-cp38/bin:/opt/p
 cd python
 python3.10 -m venv venv
 source venv/bin/activate
-pip install "maturin~=0.14.0"
+pip install -r requirements.dev.txt
 maturin develop --release -m Cargo.toml
 python generate_stubs.py pyoxigraph pyoxigraph.pyi --black
 maturin build --release -m Cargo.toml --features abi3 --compatibility manylinux2014

.github/workflows/musllinux_build.sh

@@ -8,7 +8,7 @@ export PATH="${PATH}:/opt/python/cp37-cp37m/bin:/opt/python/cp38-cp38/bin:/opt/p
 cd python
 python3.10 -m venv venv
 source venv/bin/activate
-pip install "maturin~=0.14.0"
+pip install -r requirements.dev.txt
 maturin develop --release -m Cargo.toml
 python generate_stubs.py pyoxigraph pyoxigraph.pyi --black
 maturin build --release -m Cargo.toml --features abi3 --compatibility musllinux_1_1