Fix "Tests" workflow

.github/workflows/pythonapp.yml

@@ -1,6 +1,13 @@
+# This workflow will install Python dependencies, run tests and lint with a single version of Python
+# For more information see: https://help.github.com/actions/language-and-framework-guides/using-python-with-github-actions
+
 name: Tests
 
-on: [push]
+on:
+  push:
+    branches: [ master, dev ]
+  pull_request:
+    branches: [ master ]
 
 jobs:
   build:
@@ -12,18 +19,18 @@ jobs:
     - name: Set up Python 3.8
       uses: actions/setup-python@v1
       with:
-        python-version: 3.7
+        python-version: 3.8
     - name: Install dependencies
       run: |
         python -m pip install --upgrade pip
-        pip install .
+        pip install -r requirements.txt
     - name: Lint with flake8
       run: |
         pip install flake8
         # stop the build if there are Python syntax errors or undefined names
         flake8 . --count --select=E9,F63,F7,F82 --show-source --statistics
         # exit-zero treats all errors as warnings. The GitHub editor is 127 chars wide
-        flake8 . --count --exit-zero --max-complexity=10 --max-line-length=80 --statistics
+        flake8 . --count --exit-zero --max-complexity=10 --max-line-length=127 --statistics
     - name: Test with pytest
       run: |
         pip install pytest

README.md

@@ -3,7 +3,7 @@
 ProtoTorch is a PyTorch-based Python toolbox for bleeding-edge research in
 prototype-based machine learning algorithms.
 
-![Tests](https://github.com/si-cim/prototorch/workflows/Tests/badge.svg?branch=master)
+![Tests](https://github.com/si-cim/prototorch/workflows/Tests/badge.svg)
 
 ## Description