Update build.yml

Author: torresc24

.github/workflows/build.yml

@@ -1,9 +1,9 @@
 name: build
 on:
   push:
-    # Sequence of patterns matched against refs/tags
-    tags:
-      - 'v*' # Push events to matching v*, i.e. v1.0, v20.15.10
+    branches: [ master ]
+  pull_request:
+    branches: [ master ]
 jobs:
   build:
     runs-on: Ubuntu-18.04
@@ -36,9 +36,3 @@ jobs:
       - name: Build binary wheel and a source tarball
         if: ${{ matrix.python-version == '3.6.8' }}
         run: python setup.py sdist
-      - name: Publish a Python distribution to PyPI
-        if: ${{ matrix.python-version == '3.6.8' }}
-        uses: pypa/gh-action-pypi-publish@release/v1
-        with:
-          user: __token__
-          password: ${{ secrets.PYPI_API_TOKEN }}