Improve main CI workflow

Author: ayodejidev

.github/workflows/unittest.yml renamed to .github/workflows/python-ci.yml

@@ -1,26 +1,40 @@
-name: Python package
+name: Python CI
 
-on: [workflow_call, pull_request]
+on:
+  push:
+    branches:
+      - main
+      - develop
+  pull_request:
+    branches:
+      - main
+      - develop
+  workflow_dispatch: {}
 
 jobs:
   build:
-
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: ['3.6','3.7', '3.8']
+        python-version: ['3.6', '3.7', '3.8']
 
     steps:
-      - uses: actions/checkout@v4
+      - name: Checkout
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+
       - name: Set up Python ${{ matrix.python-version }}
         uses: actions/setup-python@v5
         with:
           python-version: ${{ matrix.python-version }}
+
       - name: Install dependencies
         run: |
           python -m pip install --upgrade pip
           pip install tox
           sudo apt-get update
           sudo apt install libcurl4-openssl-dev
+
       - name: Test with tox
         run: tox