add new tests in generated archive

.gitignore

@@ -40,3 +40,4 @@ tmp-php.ini
 cmake-build-debug
 CMakeLists.txt
 local_test.php
+xlswriter-*.tgz

package.xml

@@ -73,6 +73,8 @@
                 <file role="src" name="014.phpt" />
                 <file role="src" name="015.phpt" />
                 <file role="src" name="016.phpt" />
+                <file role="src" name="017.phpt" />
+                <file role="src" name="018.phpt" />
             </dir>
         </dir>
     </contents>
@@ -156,4 +158,4 @@
             </notes>
         </release>
     </changelog>
-</package>
+</package>