Change release min supported version to 3.0.0

Author: Alexandra Nantel

extension.meta.xml

@@ -15,7 +15,7 @@
         </author>
     </authors>
     <releases>
-        <release version="3.0.0" date="TBA" min="4.0.0" max="4.x.x" php-min="5.6.x" php-max="7.x.x">
+        <release version="3.0.0" date="TBA" min="3.0.0" max="4.x.x" php-min="5.6.x" php-max="7.x.x">
             - Update for Symphony 4.x
             - PHP7 Compatibility
             - Code refactoring for Database and EQFA