update library an readme

Author: kangreon

.github/workflows/main.yaml

@@ -13,6 +13,7 @@ jobs:
     - name: Lint code
       run: |
         make lint
+
   test:
     runs-on: ubuntu-latest
     strategy:
@@ -27,7 +28,9 @@ jobs:
     - name: Install dependencies
       run: |
         make deps
+
   publish:
+    if: github.ref == 'refs/heads/main'
     needs: [lint, test]
     runs-on: ubuntu-latest
     steps:
@@ -48,4 +51,4 @@ jobs:
       if: startsWith(github.ref, 'refs/tags')
       uses: pypa/gh-action-pypi-publish@release/v1
       with:
-        password: ${{ secrets.PYPI_API_TOKEN }}
+        password: ${{ secrets.PYPI_API_TOKEN }}