add ci badge to readme

Author: ScottBoyce

.github/workflows/python-pytest.yml

@@ -1,8 +1,12 @@
-name: CI - Pytest
+name: CI
 
 on:
   push:
+    branches:
+      - main
   pull_request:
+    branches:
+      - main
 
 jobs:
   run-tests:

README.md

@@ -1,6 +1,9 @@
-
 # DateIntervalCycler
 
+<p align="left">
+  <img src="https://github.com/ScottBoyce-Python/DateIntervalCycler/actions/workflows/python-pytest.yml/badge.svg" alt="Build Status" height="20">
+</p>
+
 DateIntervalCycler is a Python class that cycles through datetime intervals based on provided (month, day) tuples. Intervals can be cycled through using a next and back methods or as an iterator within a loop. Specific intervals can be queried with an index or containing date. Lastly, the entire interval series can be converted to a list of tuples.
 
 If cycles contains (2, 29), then it will honor leap years by setting the interval date time (2, 28) for non-leap years. However, if the cycles contains both (2, 28) and (2, 29), then it will skip using (2, 29) for non-leap years.