fix: version solving (#20)

Author: ViAchKoN

.github/workflows/test.yml

@@ -67,10 +67,10 @@ jobs:
         run: poetry install --no-interaction
 
       - name: Install sqlalchemy ${{ matrix.sqlalchemy-version }}
-        run: poetry run pip install sqlalchemy==${{ matrix.sqlalchemy-version }}
+        run: poetry add sqlalchemy==${{ matrix.sqlalchemy-version }}
 
       - name: Install pydantic ${{ matrix.pydantic-version }}
-        run: poetry run pip install pydantic==${{ matrix.pydantic-version }}
+        run: poetry add pydantic==${{ matrix.pydantic-version }}
 
       - name: Run tests
         run: poetry run pytest  --cov-report=xml

README.md

@@ -7,7 +7,11 @@ _____
 ___
 ### Installation
 ```bash
+# without extras 
 pip install dataclass-sqlalchemy-mixins
+
+# with pydantic 
+pip install dataclass-sqlalchemy-mixins[pydantic]
 ```
 ___
 ### Description