chore: add phpunit 9 support fix merge conflicts

Author: mikeerickson

src/Printer.php

@@ -40,11 +40,21 @@ class Printer extends ResultPrinter71
 }
 
 $low  = version_compare(Version::series(), '8.0', '>=');
-$high = true; // version_compare(Version::series(),'8.99.99','<=');
+$high = version_compare(Version::series(),'8.99.99','<=');
 
 if ($low && $high) {
     class Printer extends ResultPrinter80
     {
         use PrinterTrait8;  // new trait introduced for PHP 8.x
     }
 }
+
+$low  = version_compare(Version::series(), '9.0', '>=');
+$high = true; // version_compare(Version::series(),'8.99.99','<=');
+
+if ($low && $high) {
+    class Printer extends ResultPrinter90
+    {
+        use PrinterTrait8;  // new trait introduced for PHP 8.x
+    }
+}

src/ResultPrinter80.php

@@ -11,7 +11,11 @@
 use PHPUnit\Framework\TestFailure;
 
 $low  = version_compare(Version::series(), '8.0', '>=');
+<<<<<<< HEAD
 $high = true; // version_compare(Version::series(),'7.1.99','<=');
+=======
+$high = version_compare(Version::series(),'8.99.99','<=');
+>>>>>>> php74-phpunit9
 
 if ($low && $high) {
     class ResultPrinter80 extends ResultPrinter