All tests are passing now. I've changed configuration to use Ubuntu 12.04 LTS (precise) because it's the one that still supports 5.3. Also, changed to sudo: false to make use of containerised infrastructure in Travis.

@serbanghita bump

You could setup the testing matrix like this to only uses the Precise distro on the 5.3 tests. Also, nice to add the nightly builds with allowed failures and a fast finish

matrix:
  include:
    - php: 5.3
      dist: precise
    - php: 5.4
    - php: 5.5
    - php: 5.6
    - php: 7.0
    - php: 7.1
    - php: 7.2
    - php: nightly
  allow_failures:
    - php: nightly
  fast_finish: true

Thanks @JayBizzle, I updated .travis.yml accordingly.

Can this be merged @serbanghita?

@emirb thank you 🍻