agora esta dando o seguinte erro na instalação do projeto que é: your requerements could not be resolved to an installable set of packages.
cakephp/cakephp 3.1.5 requires ext-intl -> the requested php extension intl is missing from your system. cakephp/cakephp 3.1.4 requires ext-intl -> the requested php extension intl is missing from your system. cakephp/cakephp 3.1.3 requires ext-intl -> the requested php extension intl is missing from your system. cakephp/cakephp 3.1.2 requires ext-intl -> the requested php extension intl is missing from your system. cakephp/cakephp 3.1.1 requires ext-intl -> the requested php extension intl is missing from your system. cakephp/cakephp 3.1.0 requires ext-intl -> the requested php extension intl is missing from your system. installation reques for cakephp/cakephp ~3.1 -> satisfiable by cakephp[3.1.0, 3.1.1, 3.1.2, 3.1.3, 3.1.4, 3.1.5].
