Fairly minor update, no code change, just added a new test to cover the
flag that was recently added to the API and expanded the documentation
to also include it.
* feat: pull country or language by code.
This differs from the existing `search` functionality in that it allows
you to explicitly pull back a single country or language instead of
anything that matches (which could result in more items returned than
expected).
* docs(readme): update to include examples for new functionality.
* test: expand tests to include new parameters.
* fix(client): dropped some commented out code that wasn't in use.
* docs(license): bump the year of the license.
* chore(ci): Added 7.4 (just released) and nightly (as an allowed failure).
* chore(composer): Swap out abandoned coveralls package for maintained version.
* chore(composer): Added PHPUnit as a dev dependency.
* chore(ci): Dropped a ton of the juggling in favor of version juggling in Composer.
* fix(readme): Corrected the badge for the license.
* chore(composer): Bumped the package's version number.
* Reworked interfacing to drop the versioning in the class name.
* Refactored / cleaned up existing code.
* Stuck with support for PHP 5.3+ since PHP 5.x still seems to hold majority.
* Abstracted request logic to another class for mocking.
* Added test suite and hit full code coverage.
* Updated readme, included migration guide and the full gamut of examples.
* Wired up travis-ci and coveralls for testing and coverage.
