chore: update GitHub Actions workflow to install development dependencies with Poetry

Author: NEZuko1337

.github/workflows/tests.yml

@@ -26,7 +26,7 @@ jobs:
           version: latest
 
       - name: Install dependencies
-        run: poetry install --no-interaction --no-ansi
+        run: poetry install --no-interaction --no-ansi --extras dev
 
       - name: Check code with ruff
         run: poetry run ruff check .
@@ -50,7 +50,7 @@ jobs:
           version: latest
 
       - name: Install dependencies
-        run: poetry install --no-interaction --no-ansi
+        run: poetry install --no-interaction --no-ansi --extras dev
 
       - name: Check code formatting with black
         run: poetry run black --check .
@@ -74,7 +74,7 @@ jobs:
           version: latest
 
       - name: Install dependencies
-        run: poetry install --no-interaction --no-ansi
+        run: poetry install --no-interaction --no-ansi --extras dev
 
       - name: Run mypy
         run: poetry run mypy .
@@ -98,7 +98,7 @@ jobs:
           version: latest
 
       - name: Install dependencies
-        run: poetry install --no-interaction --no-ansi
+        run: poetry install --no-interaction --no-ansi --extras dev
 
       - name: Run tests
         run: poetry run pytest src/tests/ -v