php - How to use the develop branch of Zend Framework 2 over composer?

In an Apigility driven application mycomposer.json is looking like this:

{
    "name": "misc - myproject-api",
    "description": "Skeleton Application for Apigility",
    "require": {
        "php": ">=5.3.23",
        "zendframework/zendframework": ">=2.3.2,<3.0.0",
        "zfcampus/zf-apigility": "~1.0",
        "zfcampus/zf-apigility-documentation": "~1.0",
        "zfcampus/zf-development-mode": "~2.0",
        "zfcampus/zf-rest": "~1.0-dev",
        "zf-commons/zfc-base": "dev-master",
        "zendframework/zend-developer-tools": "dev-master",
        "doctrine/doctrine-orm-module": "0.8.*"
    },
    "require-dev": {
        "zendframework/zftool": "dev-master",
        "zfcampus/zf-apigility-admin": "~1.0",
        "zfcampus/zf-apigility-welcome": "~1.0",
        "zfcampus/zf-deploy": "~1.0",
        "zfr/zfr-cors": "~1.0",
        "zend/zend-studio-development-mode": "~1.0"
    },
    "keywords": [
        "api",
        "apigility",
        "framework",
        "zf2"
    ],
    "support": {
        "email": "[email protected]",
        "irc": "irc://irc.freenode.net/apigility",
        "source": "https://github.com/zfcampus/zf-apigility-skeleton",
        "issues": "https://github.com/zfcampus/zf-apigility-skeleton/issues"
    },
    "extra": {
        "branch-alias": {
            "dev-master": "1.0-dev",
            "dev-develop": "1.1-dev"
        }
    },
    "config": {
        "process-timeout": 5000
    },
    "type": "library",
    "license": "BSD-3-Clause",
    "homepage": "http://apigility.org/"
}
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There is a ZF2 issue (that causes following error:Fatal error: Cannot use object of type Zend\Db\ResultSet\ResultSet as array). It has been fixed, but not merged to themaster branch yet.

Since I need it working now, I tried to switch to the branch -- updated my composer.json

{
    "name": "misc - myproject-api",
    "description": "Skeleton Application for Apigility",
    "require": {
        "php": ">=5.3.23",
        "zendframework/zendframework": "dev-develop as dev-master"
        ...
    }
    ...
}
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$ composer update
Loading composer repositories with package information
Updating dependencies (including require-dev)
  - Updating zendframework/zendframework (dev-master de98f63 => dev-develop be0b349)
    Checking out be0b3496b73a61a255d05e945b75f6fdf0995c31

Writing lock file
Generating autoload files
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I've triedthe the composerrequire direction value for thedevelop branch (2.4.*@dev) from the Packagist page of the Zend Framework. The result is the same as withdev-develop ordev-develop as dev-master -- the console shows the correct branch (or better the correct commitbe0b349) downloading

$ composer update
Loading composer repositories with package information
Updating dependencies (including require-dev)
  - Removing zendframework/zendframework (2.3.4)
  - Installing zendframework/zendframework (dev-develop be0b349)
    Cloning be0b3496b73a61a255d05e945b75f6fdf0995c31

Writing lock file
Generating autoload files
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but after the updating, the code is still like in themaster branch.

UPDATE

$ cd [project root directory]/vendor/zendframework/zendframework
$ git status
# On branch develop
nothing to commit (working directory clean)
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That means, the branch is correct. And its also up-to-date, since the last commit ,git log shows isbe0b3496b73a61a255d05e945b75f6fdf0995c31 from 3d of February -- and that is actually the current HEAD revision.

So, the branch is correct, the revision is correct... Why is the code uot-of-date?