Update .travis.yml

Author: stefanchiriac

.travis.yml

@@ -10,7 +10,7 @@ matrix:
  fast_finish: true
 
 before_script:
- - git clone -b 3.0.1 git://github.com/phalcon/cphalcon.git --depth=1 && cd cphalcon/build/safe && phpize && ./configure --enable-phalcon && sudo make install
+ - git clone -b 3.0.x git://github.com/phalcon/cphalcon.git --depth=1 && cd cphalcon/build/safe && phpize && ./configure --enable-phalcon && sudo make install
  - cd ../../../ && phpenv config-add ./spec/phalcon.ini
  - composer self-update
  - composer install --dev --prefer-source