Moved from `php_version` to `programming_language_version` for consistency.#2

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Commits on Feb 15, 2017

Pull php version from both 'php_version' or 'programming_language_version'.
vovafeldman
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Don't require 'php_version', instead require one of the two 'php_version' or 'programming_language_version'.
vovafeldman
authored