Your requirements could not be resolved to an installable set of packages.

[praphul-kumar]

Your requirements could not be resolved to an installable set of packages.

Problem 1
- alchemyguy/youtube-laravel-api[dev-master, v1.0.1, ..., v1.0.3] require google/apiclient ^2.0 -> satisfiable by google/apiclient[v2.0.0-RC1, ..., 2.x-dev (alias of dev-master)].
- google/apiclient 2.x-dev is an alias of google/apiclient dev-master and thus requires it to be installed too.
- alchemyguy/youtube-laravel-api[1.0.0, ..., v1.0.0.2] require illuminate/support ~5.1 -> found illuminate/support[v5.1.1, ..., 5.8.x-dev] but these were not loaded, likely because it conflicts with another require.
- google/apiclient[dev-master, v2.6.0, ..., v2.10.1] require guzzlehttp/psr7 ^1.2 -> found guzzlehttp/psr7[1.2.0, ..., 1.x-dev] but the package is fixed to 2.0.0 (lock file version) by a partial update and that version does not match. Make sure you list it as an argument for the update command.
- google/apiclient[v2.0.0-RC1, ..., v2.2.4] require monolog/monolog ^1.17 -> found monolog/monolog[1.17.0, ..., 1.x-dev] but the package is fixed to 2.3.2 (lock file version) by a partial update and that version does not match. Make sure you list it as an argument for the update command.
- google/apiclient[v2.3.0, ..., v2.5.0] require guzzlehttp/guzzle ~5.3.1||~6.0 -> found guzzlehttp/guzzle[5.3.1, ..., 5.3.x-dev, 6.0.0, ..., 6.5.x-dev] but it conflicts with your root composer.json require (^7.3).
- alchemyguy/youtube-laravel-api 1.0.x-dev is an alias of alchemyguy/youtube-laravel-api dev-master and thus requires it to be installed too.
- Root composer.json requires alchemyguy/youtube-laravel-api ^1.0 -> satisfiable by alchemyguy/youtube-laravel-api[1.0.0, ..., 1.0.x-dev (alias of dev-master)].

Use the option --with-all-dependencies (-W) to allow upgrades, downgrades and removals for packages currently locked to specific versions.

Installation failed, reverting ./composer.json and ./composer.lock to their original content.