Written (and modified some existing) tests for change of update() method
Written (and modified some existing) tests for change of update() method

Signed-off-by: Frank Mayer <86a8c2da8527a1c6978bdca6d7986fe14ae147fe@frankmayer.net>

frankmayer/ArangoDB-PHP,cesarsmaniotto/arangodb-php,arangodb/arangodb-php,cesarsmaniotto/arangodb-php,frankmayer/ArangoDB-PHP,arangodb/arangodb-php,diabl0/arangodb-php,diabl0/arangodb-php