build: drop support of py 3.7

Author: linw1995

.github/workflows/release.yml

@@ -13,7 +13,7 @@ jobs:
     - name: Set up PDM
       uses: pdm-project/[email protected]
       with:
-        python-version: 3.7
+        python-version: 3.8
     - name: Build release
       run: |
         pdm build

.github/workflows/test.yml

@@ -36,7 +36,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: [3.7, 3.8, 3.9, "3.10", "3.11"]
+        python-version: [3.8, 3.9, "3.10", "3.11"]
     steps:
     - uses: actions/checkout@v1
     - name: Set up PDM

README.rst

@@ -155,7 +155,7 @@ pre-commit_ and nox_ CLIs in your environment.
 .. code-block:: shell
 
     make init
-    make PYTHON=3.7 init  # for specific python version
+    make PYTHON=3.8 init  # for specific python version
 
 Linting
 ~~~~~~~

docs/source/contributing.rst

@@ -20,7 +20,7 @@ pre-commit_ and nox_ CLIs in your environment.
 .. code-block:: shell
 
     make init
-    make PYTHON=3.7 init  # for specific python version
+    make PYTHON=3.8 init  # for specific python version
 
 Linting
 ~~~~~~~