Fix README buttons

Author: sualeh

README.md

@@ -1,6 +1,6 @@
-[![Build Status](https://travis-ci.org/schemacrawler/SchemaCrawler-Database-Plugins.svg?branch=master)](https://travis-ci.org/schemacrawler/SchemaCrawler-Database-Plugins)
-
-[![The Central Repository](https://img.shields.io/maven-central/v/us.fatehi/schemacrawler-database-plugins-parent.svg)](https://search.maven.org/search?q=g:us.fatehi%20a:schemacrawler*)
+![Integration Tests](https://github.com/schemacrawler/SchemaCrawler-Database-Plugins/workflows/Integration%20Tests/badge.svg)
+[![codecov](https://codecov.io/gh/schemacrawler/SchemaCrawler/branch/master/graph/badge.svg)](https://codecov.io/gh/schemacrawler/SchemaCrawler-Database-Plugins)
+[![The Central Repository](https://img.shields.io/maven-central/v/us.fatehi/schemacrawler-database-plugins-parent.svg)](https://search.maven.org/search?q=g:us.fatehi%20schemacrawler*)