Add github actions CI. (#41)

* Add github actions CI.

* try to fix CI.

* try to fix CI.

* try to fix CI.

* add CI badge.

.github/workflows/CI.yml

@@ -0,0 +1,33 @@
+name: CI
+
+on: [push, pull_request]
+
+jobs:
+  build:
+
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        python-version: ['3.7', '3.8', '3.9']
+
+    name: Python ${{ matrix.python-version }} CI
+
+    steps:
+    - uses: actions/checkout@v2
+    - run: git fetch --prune --unshallow
+
+    - name: Setup python
+      uses: actions/setup-python@v2
+      with:
+        python-version: ${{ matrix.python-version }}
+    - name: Install dependencies
+      run: |
+        python -m pip install pytest
+    - name: unit tests
+      run: |
+        disp=:99
+        screen=0
+        geom=640x480x24
+        exec Xvfb $disp -screen $screen $geom 2>/tmp/Xvfb.log &
+        export DISPLAY=:99
+        cd tests && pytest .

README.md

@@ -3,6 +3,7 @@
 # PyJSONViewer
 A JSON file data viewer using pure python
 
+[![CI](https://github.com/AtsushiSakai/PyJSONViewer/actions/workflows/CI.yml/badge.svg)](https://github.com/AtsushiSakai/PyJSONViewer/actions/workflows/CI.yml)
 [![Downloads](https://pepy.tech/badge/pyjsonviewer)](https://pepy.tech/project/pyjsonviewer)
 [![Downloads](https://pepy.tech/badge/pyjsonviewer/month)](https://pepy.tech/project/pyjsonviewer)
 [![Downloads](https://pepy.tech/badge/pyjsonviewer/week)](https://pepy.tech/project/pyjsonviewer)
@@ -39,7 +40,7 @@ Features:
 
 # Requirements
 
-- Python 3.6.x or higher
+- Python 3.7 or higher
 
 # Download