Add Unit Test badge to Readme

README.md

@@ -1,6 +1,7 @@
 ScripturNum
 ===========
 
+[![Unit Tests](https://github.com/jkrrv/ScripturNum/actions/workflows/Unit_Tests.yml/badge.svg)](https://github.com/jkrrv/ScripturNum/actions/workflows/Unit_Tests.yml)
 [![Coverage Status](https://coveralls.io/repos/github/jkrrv/ScripturNum/badge.svg)](https://coveralls.io/github/jkrrv/ScripturNum)
 
 This is a PHP Library intended for working with scripture references. It can parse text-based scripture references, and
@@ -190,4 +191,4 @@ are zero-indexed.  Genesis is book 0.  Genesis 1:1 has the integer value of 0.
 
 - The Book index << 24
 - Start reference << 12
-- End reference << 0
+- End reference << 0