Update zendframework/zend-code

[maxbucknell]

• Update zendframework/zend-code to ~3.3.0

Description

As per the issue (#93), update the dependency on zendframework/zend-code to ~3.3.0.

Fixed Issues (if relevant)

1. Update zendframework/zend-code #93: Update zendframework/zend-code

Manual testing scenarios

Shouldn't be any testing required. The site still seems to function normally, but all tests should run to check for regressions.

Contribution checklist

• Pull request has a meaningful description of its purpose
• All commits are accompanied by meaningful commit messages
• All new or changed code is covered with unit/integration tests (if applicable)
• All automated tests passed successfully (all builds on Travis CI are green)

[maxbucknell]

The Travis build came back with some errors in generation. I will review these and see if they are significant, or whether we can just update the tests. (For only whitespace, and other syntactically insignificant changes.)

[buskamuza]

One difference that I observed is a difference in arrays representation: array() vs []