在提出这个问题时，Laravel 的最新版本是 5.6.37 - 于 2 天前发布，即 2018 年 9 月 2 日。
我已经有一个正在开发的项目。在运行composer update时，我总是得到以下信息：
Loading composer repositories with package information Updating dependencies (including require-dev) Nothing to install or update Generating optimized autoload files > IlluminateFoundationComposerScripts::postAutoloadDump > @php artisan package:discover Discovered Package: fideloper/proxy Discovered Package: laravel/tinker Discovered Package: barryvdh/laravel-debugbar Discovered Package: nunomaduro/collision Package manifest generated successfully.
这仅在我将 Laravel 项目更新到 5.6.35 后才开始。
当我安装新的 laravel 项目时，情况并非如此。在新安装时，会下载最新版本的 laravel，即 5.6.37。
下面是我的composer.json文件
{ "name": "laravel/laravel", "description": "The Laravel Framework.", "keywords": ["framework", "laravel"], "license": "MIT", "type": "project", "require": { "php": "^7.1.3", "fideloper/proxy": "^4.0", "laravel/framework": "5.6.*", "laravel/tinker": "^1.0", "spinen/laravel-mail-assertions": "^0.3.4" }, "require-dev": { "barryvdh/laravel-debugbar": "^3.1", "codedungeon/phpunit-result-printer": "^0.19.13", "filp/whoops": "^2.0", "fzaninotto/faker": "^1.4", "mockery/mockery": "^1.0", "nunomaduro/collision": "^2.0", "phpunit/phpunit": "^7.0" }, "autoload": { "classmap": [ "database/seeds", "database/factories" ], "psr-4": { "Larammerce\": "app/" } }, "autoload-dev": { "psr-4": { "Tests\": "tests/" } }, "extra": { "laravel": { "dont-discover": [ ] } }, "scripts": { "post-root-package-install": [ "@php -r "file_exists('.env') || copy('.env.example', '.env');"" ], "post-create-project-cmd": [ "@php artisan key:generate" ], "post-autoload-dump": [ "Illuminate\Foundation\ComposerScripts::postAutoloadDump", "@php artisan package:discover" ] }, "config": { "preferred-install": "dist", "sort-packages": true, "optimize-autoloader": true }, "minimum-stability": "dev", "prefer-stable": true }
我不知道我一定在哪里犯了错误，犯了什么错误。
composer dump-autoload &&composer updatecomposer.lock文件和vendor目录。然后运行composer update但无法将我的项目更新到 Laravel 版本 5.6.37
更新1
在运行composer show -i时，我得到以下结果：
barryvdh/laravel-debugbar v3.1.5 PHP Debugbar integration for Laravel codedungeon/php-cli-colors 1.10.7 PHP Package for using color output in CLI commands codedungeon/phpunit-result-printer 0.19.13 PHPUnit Pretty Result Printer dnoegel/php-xdg-base-dir 0.1 implementation of xdg base directory specification for php doctrine/inflector v1.3.0 Common String Manipulations with regard to casing and singular/plural rules. doctrine/instantiator 1.1.0 A small, lightweight utility to instantiate objects in PHP without invoking their constructors doctrine/lexer v1.0.1 Base library for a lexer that can be used in Top-Down, Recursive Descent Parsers. dragonmantank/cron-expression v2.2.0 CRON for PHP: Calculate the next or previous run date and determine if a CRON expression is due egulias/email-validator 2.1.5 A library for validating emails against several RFCs erusev/parsedown 1.7.1 Parser for Markdown. fideloper/proxy 4.0.0 Set trusted proxies for Laravel filp/whoops 2.2.0 php error handling for cool kids fzaninotto/faker v1.8.0 Faker is a PHP library that generates fake data for you. hamcrest/hamcrest-php v2.0.0 This is the PHP port of Hamcrest Matchers hassankhan/config 1.1.0 Lightweight configuration file loader that supports PHP, INI, XML, JSON, and YAML files jakub-onderka/php-console-color 0.1 jakub-onderka/php-console-highlighter v0.3.2 laravel/framework v5.6.35 The Laravel Framework. laravel/tinker v1.0.7 Powerful REPL for the Laravel framework. league/flysystem 1.0.46 Filesystem abstraction: Many filesystems, one API. maximebf/debugbar v1.15.0 Debug bar in the browser for php application mockery/mockery 1.1.0 Mockery is a simple yet flexible PHP mock object framework monolog/monolog 1.23.0 Sends your logs to files, sockets, inboxes, databases and various web services myclabs/deep-copy 1.8.1 Create deep copies (clones) of your objects nesbot/carbon 1.25.0 A simple API extension for DateTime. nikic/php-parser v4.0.3 A PHP parser written in PHP nunomaduro/collision v2.0.3 Cli error handling for console/command-line PHP applications. paragonie/random_compat v9.99.99 PHP 5.x polyfill for random_bytes() and random_int() from PHP 7 phar-io/manifest 1.0.3 Component for reading phar.io manifest information from a PHP Archive (PHAR) phar-io/version 2.0.1 Library for handling version information and constraints phpdocumentor/reflection-common 1.0.1 Common reflection classes used by phpdocumentor to reflect the code structure phpdocumentor/reflection-docblock 4.3.0 With this component, a library can provide support for annotations via DocBlocks or otherwise r... phpdocumentor/type-resolver 0.4.0 phpspec/prophecy 1.8.0 Highly opinionated mocking framework for PHP 5.3+ phpunit/php-code-coverage 6.0.7 Library that provides collection, processing, and rendering functionality for PHP code coverage... phpunit/php-file-iterator 2.0.1 FilterIterator implementation that filters files based on a list of suffixes. phpunit/php-text-template 1.2.1 Simple template engine. phpunit/php-timer 2.0.0 Utility class for timing phpunit/php-token-stream 3.0.0 Wrapper around PHP's tokenizer extension. phpunit/phpunit 7.3.2 The PHP Unit Testing framework. psr/container 1.0.0 Common Container Interface (PHP FIG PSR-11) psr/log 1.0.2 Common interface for logging libraries psr/simple-cache 1.0.1 Common interfaces for simple caching psy/psysh v0.9.7 An interactive shell for modern PHP. ramsey/uuid 3.8.0 Formerly rhumsaa/uuid. A PHP 5.4+ library for generating RFC 4122 version 1, 3, 4, and 5 univer... sebastian/code-unit-reverse-lookup 1.0.1 Looks up which function or method a line of code belongs to sebastian/comparator 3.0.2 Provides the functionality to compare PHP values for equality sebastian/diff 3.0.1 Diff implementation sebastian/environment 3.1.0 Provides functionality to handle HHVM/PHP environments sebastian/exporter 3.1.0 Provides the functionality to export PHP variables for visualization sebastian/global-state 2.0.0 Snapshotting of global state sebastian/object-enumerator 3.0.3 Traverses array structures and object graphs to enumerate all referenced objects sebastian/object-reflector 1.1.1 Allows reflection of object attributes, including inherited and non-public ones sebastian/recursion-context 3.0.0 Provides functionality to recursively process PHP variables sebastian/resource-operations 1.0.0 Provides a list of PHP built-in functions that operate on resources sebastian/version 2.0.1 Library that helps with managing the version number of Git-hosted PHP projects spinen/laravel-mail-assertions 0.3.4 PHPUnit mail assertions for testing email in Laravel. swiftmailer/swiftmailer v6.1.2 Swiftmailer, free feature-rich PHP mailer symfony/console v4.1.4 Symfony Console Component symfony/css-selector v4.1.4 Symfony CssSelector Component symfony/debug v4.1.4 Symfony Debug Component symfony/event-dispatcher v4.1.4 Symfony EventDispatcher Component symfony/finder v4.1.4 Symfony Finder Component symfony/http-foundation v4.1.4 Symfony HttpFoundation Component symfony/http-kernel v4.1.4 Symfony HttpKernel Component symfony/polyfill-ctype v1.9.0 Symfony polyfill for ctype functions symfony/polyfill-mbstring v1.9.0 Symfony polyfill for the Mbstring extension symfony/polyfill-php72 v1.9.0 Symfony polyfill backporting some PHP 7.2+ features to lower PHP versions symfony/process v4.1.4 Symfony Process Component symfony/routing v4.1.4 Symfony Routing Component symfony/translation v4.1.4 Symfony Translation Component symfony/var-dumper v4.1.4 Symfony mechanism for exploring and dumping PHP variables symfony/yaml v4.1.4 Symfony Yaml Component theseer/tokenizer 1.1.0 A small library for converting tokenized PHP source code into XML and potentially other formats tijsverkoyen/css-to-inline-styles 2.2.1 CssToInlineStyles is a class that enables you to convert HTML-pages/files into HTML-pages/files... vlucas/phpdotenv v2.5.1 Loads environment variables from `.env` to `getenv()`, `$_ENV` and `$_SERVER` automagically. webmozart/assert 1.3.0 Assertions to validate method input/output with nice error messages.
删除
vendor文件夹并运行composer install对我来说是这样。