PHPC-285: Allow for PHP 7.x support in package.xml

Author: jmikola

bin/package.xml.in

@@ -47,7 +47,7 @@ necessary to build a fully-functional MongoDB driver.
   <required>
    <php>
     <min>5.4.0</min>
-    <max>5.99.99</max>
+    <max>7.99.99</max>
    </php>
    <pearinstaller>
     <min>1.4.8</min>