bump python to 3.8 (#11)

Author: Atticus1806

.github/workflows/black.yml

@@ -13,7 +13,7 @@ jobs:
     - uses: actions/checkout@v2
     - uses: actions/setup-python@v2
       with:
-        python-version: 3.7
+        python-version: 3.8
         cache: 'pip'
     - run: pip install black==22.3.0
     - run: black --diff --check .

.github/workflows/model_tests.yml

@@ -16,7 +16,7 @@ jobs:
           path: ""
       - uses: actions/setup-python@v2
         with:
-          python-version: 3.7
+          python-version: 3.8
           cache: 'pip'
       - run: |
           pip install pytest

pyproject.toml

@@ -1,4 +1,4 @@
 [tool.black]
 line-length = 120
-target-version = ["py37"]
+target-version = ["py38"]
 exclude = 'files'