Make PHPUnit fail on deprecation errors (#51)

configure phpunit to show deprecation notices and convert them to exceptions.

Co-authored-by: John Hunt <john.hunt@lightcast.io>

Author: ttgrules

phpunit.xml.dist

@@ -4,10 +4,14 @@
          convertErrorsToExceptions="true"
          convertNoticesToExceptions="true"
          convertWarningsToExceptions="true"
+         convertDeprecationsToExceptions="true"
          stopOnError="false"
          stopOnFailure="false"
          stopOnIncomplete="false"
          stopOnSkipped="false">
+    <php>
+      <ini name="error_reporting" value="-1" />
+    </php>
 
     <testsuites>
         <testsuite name="Test Suite">