skip pipfile in ci

Author: TomeHirata

.github/workflows/build.yml

@@ -25,16 +25,13 @@ jobs:
     - name: Install pipenv
       run: |
         python -m pip install --upgrade pip
-        pip install pipenv
-
-    - name: Install dependencies
-      run: |
-        pipenv install --dev --python ${{ matrix.python-version }}
+        pip install .
+        pip install -r requriements-dev.txt
 
     - name: Lint with ruff
       run: |
-        pipenv run lint
+        ruff check .
 
     - name: Run unit tests
       run: |
-        pipenv run unittest
+        python -m unittest

requirements-dev.txt

@@ -0,0 +1,3 @@
+build==1.2.1
+ruff==0.4.9
+sphinx==7.3.7