Update version number to 4.3.0-RC4
Update version number to 4.3.0-RC4

CakeDC/cakephp,CakeDC/cakephp,cakephp/cakephp,ADmad/cakephp,ndm2/cakephp,CakeDC/cakephp,ndm2/cakephp,CakeDC/cakephp,cakephp/cakephp,cakephp/cakephp,ndm2/cakephp,ADmad/cakephp,ADmad/cakephp,ADmad/cakephp,cakephp/cakephp,ndm2/cakephp