我正在尝试将Laravel 5.1.35升级到Laravel 5.2，并且出现以下错误：
Problem 1
- laravel/framework v5.1.35 requires symfony/css-selector 2.7.* -> satisfiable by symfony/css-selector[2.7.x-dev, v2.7.0, v2.7.0-BETA1, v2.7.0-BETA2, v2.7.1, v2.7.10, v2.7.11, v2.7.12, v2.7.13, v2.7.14, v2.7.15, v2.7.16, v2.7.2, v2.7.3, v2.7.4, v2.7.5, v2.7.6, v2.7.7, v2.7.8, v2.7.9] but these conflict with your requirements or minimum-stability.
- Conclusion: don't install laravel/framework v5.2.43
- Conclusion: don't install laravel/framework v5.2.42
- Conclusion: don't install laravel/framework 5.2.41
- Conclusion: don't install laravel/framework v5.2.40
- Conclusion: don't install laravel/framework v5.2.39
- Conclusion: don't install laravel/framework v5.2.38
- Conclusion: don't install laravel/framework v5.2.37
- Conclusion: don't install laravel/framework v5.2.36
- Conclusion: don't install laravel/framework v5.2.35
- Conclusion: don't install laravel/framework v5.2.34
- Conclusion: don't install laravel/framework v5.2.33
- Conclusion: don't install laravel/framework v5.2.32
- Conclusion: don't install laravel/framework v5.2.31
- Conclusion: don't install laravel/framework v5.2.30
- Conclusion: don't install laravel/framework v5.2.29
- Conclusion: don't install laravel/framework v5.2.28
- Conclusion: don't install laravel/framework v5.2.27
- Conclusion: don't install laravel/framework v5.2.26
- Conclusion: don't install laravel/framework v5.2.25
- Conclusion: don't install laravel/framework v5.2.24
- Conclusion: don't install laravel/framework v5.2.23
- Conclusion: don't install laravel/framework v5.2.22
- Conclusion: don't install laravel/framework v5.2.21
- Conclusion: don't install laravel/framework v5.2.20
- Conclusion: don't install laravel/framework v5.2.19
- Conclusion: don't install laravel/framework v5.2.18
- Conclusion: don't install laravel/framework v5.2.17
- Conclusion: don't install laravel/framework v5.2.16
- Conclusion: don't install laravel/framework v5.2.15
- Conclusion: don't install laravel/framework v5.2.14
- Conclusion: don't install laravel/framework v5.2.13
- Conclusion: don't install laravel/framework v5.2.12
- Conclusion: don't install laravel/framework v5.2.11
- Conclusion: don't install laravel/framework v5.2.10
- Conclusion: don't install laravel/framework v5.2.9
- Conclusion: don't install laravel/framework v5.2.8
- Conclusion: don't install laravel/framework v5.2.7
- Conclusion: don't install laravel/framework v5.2.6
- Conclusion: don't install laravel/framework v5.2.5
- Conclusion: don't install laravel/framework v5.2.4
- Conclusion: don't install laravel/framework v5.2.3
- Conclusion: don't install laravel/framework v5.2.2
- Conclusion: don't install laravel/framework v5.2.1
- lucadegasperi/oauth2-server-laravel 5.0.3 requires illuminate/http 5.1.* -> satisfiable by laravel/framework[v5.1.35], illuminate/http[v5.1.1, v5.1.13, v5.1.16, v5.1.2, v5.1.20, v5.1.22, v5.1.25, v5.1.28, v5.1.30, v5.1.31, v5.1.41, v5.1.6, v5.1.8].
- lucadegasperi/oauth2-server-laravel 5.0.2 requires illuminate/http 5.1.* -> satisfiable by laravel/framework[v5.1.35], illuminate/http[v5.1.1, v5.1.13, v5.1.16, v5.1.2, v5.1.20, v5.1.22, v5.1.25, v5.1.28, v5.1.30, v5.1.31, v5.1.41, v5.1.6, v5.1.8].
- lucadegasperi/oauth2-server-laravel 5.0.1 requires illuminate/http 5.1.* -> satisfiable by laravel/framework[v5.1.35], illuminate/http[v5.1.1, v5.1.13, v5.1.16, v5.1.2, v5.1.20, v5.1.22, v5.1.25, v5.1.28, v5.1.30, v5.1.31, v5.1.41, v5.1.6, v5.1.8].
- lucadegasperi/oauth2-server-laravel 5.0.0 requires illuminate/http 5.1.* -> satisfiable by laravel/framework[v5.1.35], illuminate/http[v5.1.1, v5.1.13, v5.1.16, v5.1.2, v5.1.20, v5.1.22, v5.1.25, v5.1.28, v5.1.30, v5.1.31, v5.1.41, v5.1.6, v5.1.8].
- lucadegasperi/oauth2-server-laravel 5.0.3 requires illuminate/http 5.1.* -> satisfiable by laravel/framework[v5.1.35], illuminate/http[v5.1.1, v5.1.13, v5.1.16, v5.1.2, v5.1.20, v5.1.22, v5.1.25, v5.1.28, v5.1.30, v5.1.31, v5.1.41, v5.1.6, v5.1.8].
- don't install illuminate/http v5.1.1|don't install laravel/framework v5.2.0
- don't install illuminate/http v5.1.13|don't install laravel/framework v5.2.0
- don't install illuminate/http v5.1.16|don't install laravel/framework v5.2.0
- don't install illuminate/http v5.1.2|don't install laravel/framework v5.2.0
- don't install illuminate/http v5.1.20|don't install laravel/framework v5.2.0
- don't install illuminate/http v5.1.22|don't install laravel/framework v5.2.0
- don't install illuminate/http v5.1.25|don't install laravel/framework v5.2.0
- don't install illuminate/http v5.1.28|don't install laravel/framework v5.2.0
- don't install illuminate/http v5.1.30|don't install laravel/framework v5.2.0
- don't install illuminate/http v5.1.31|don't install laravel/framework v5.2.0
- don't install illuminate/http v5.1.41|don't install laravel/framework v5.2.0
- don't install illuminate/http v5.1.6|don't install laravel/framework v5.2.0
- don't install illuminate/http v5.1.8|don't install laravel/framework v5.2.0
- Installation request for laravel/framework 5.2.* -> satisfiable by laravel/framework[5.2.41, v5.2.0, v5.2.1, v5.2.10, v5.2.11, v5.2.12, v5.2.13, v5.2.14, v5.2.15, v5.2.16, v5.2.17, v5.2.18, v5.2.19, v5.2.2, v5.2.20, v5.2.21, v5.2.22, v5.2.23, v5.2.24, v5.2.25, v5.2.26, v5.2.27, v5.2.28, v5.2.29, v5.2.3, v5.2.30, v5.2.31, v5.2.32, v5.2.33, v5.2.34, v5.2.35, v5.2.36, v5.2.37, v5.2.38, v5.2.39, v5.2.4, v5.2.40, v5.2.42, v5.2.43, v5.2.5, v5.2.6, v5.2.7, v5.2.8, v5.2.9].
- Installation request for lucadegasperi/oauth2-server-laravel 5.0.* -> satisfiable by lucadegasperi/oauth2-server-laravel[5.0.0, 5.0.1, 5.0.2, 5.0.3].
[我了解某些软件包尚不支持Laravel 5.2，但在手册（https://laravel.com/docs/5.2/upgrade）中明确告知我应在composer.json中添加以下行
"symfony/css-selector": "~3.0"
但是，似乎是导致此问题的软件包。如何进行更新？谢谢。
这是我完整的composer.json
{
"name": "laravel/laravel",
"description": "The Laravel Framework.",
"keywords": [
"framework",
"laravel"
],
"license": "MIT",
"type": "project",
"require": {
"php": ">=5.5.9",
"laravel/framework": "5.2.*",
"aws/aws-sdk-php-laravel": "~3.0",
"vinkla/hashids": "^1.1",
"cartalyst/sentinel": "~2.0.1",
"baum/baum": "~1.1",
"robclancy/presenter": "1.3.*",
"barryvdh/laravel-ide-helper": "^2.0",
"league/flysystem-aws-s3-v3": "~1.0",
"intervention/image": "^2.2",
"rap2hpoutre/laravel-log-viewer": "^0.2.8",
"league/fractal": "^0.12.0",
"ramsey/uuid": "~2.8",
"lucadegasperi/oauth2-server-laravel": "5.0.*",
"torann/geoip": "0.2.*@dev",
"mailchimp/mailchimp": "^2.0",
"iron-io/iron_mq": "~2.0",
"aws/aws-sdk-php": "~3.0",
"justinrainbow/json-schema": "~1.3",
"sybio/gif-frame-extractor": "^1.0",
"coldume/imagecraft": "dev-gif-optimization",
"pragmarx/firewall": "^0.5.2",
"get-stream/stream-laravel": "dev-master",
"roumen/sitemap": "2.5.*",
"guzzlehttp/guzzle": "~6.0",
"bugsnag/bugsnag-laravel": "1.*",
"cviebrock/image-validator": "^2.0",
"toin0u/geocoder-laravel": "@stable",
"badawy/embedly": "^1.0",
"facebook/webdriver": "^1.0",
"scotteh/php-dom-wrapper": "dev-composer-symfony-fix",
"scotteh/php-goose": "dev-composer-guzzle-fix",
"doctrine/dbal": "^2.5",
"mandrill/mandrill": "1.0.*"
},
"repositories": [
{
"type": "vcs",
"url": "https://github.com/zmike808GS/imagecraft"
},
{
"type": "vcs",
"url": "https://github.com/zmike808GS/php-goose"
},
{
"type": "vcs",
"url": "https://github.com/zmike808GS/php-dom-wrapper"
}
],
"require-dev": {
"fzaninotto/faker": "~1.4",
"mockery/mockery": "0.9.*",
"phpunit/phpunit": "~4.0",
"phpspec/phpspec": "~2.1",
"laracasts/testdummy": "~2.0",
"symfony/dom-crawler": "~3.0",
"symfony/css-selector": "~3.0"
},
"autoload": {
"classmap": [
"database"
],
"psr-4": {
"**************": "*********"
}
},
"autoload-dev": {
"classmap": [
"tests"
]
},
"scripts": {
"post-install-cmd": [
"php artisan clear-compiled",
"php artisan optimize"
],
"pre-update-cmd": [
"php artisan clear-compiled"
],
"post-update-cmd": [
"php artisan clear-compiled",
"php artisan ide-helper:generate",
"php artisan optimize"
],
"post-root-package-install": [
"php -r \"copy('.env.example', '.env');\""
],
"post-create-project-cmd": [
"php artisan key:generate"
]
},
"config": {
"preferred-install": "dist",
"github-oauth": {
"github.com": "********************************************"
}
}
}
您明确需要lucadegasperi/oauth2-server-laravel版本5.0.*，即itself depends on Illuminate version 5.1.*。此依赖项Illuminate Laravel 5.1，与升级到5.2相冲突。