Make install.php accept long Chrome version string

[skip ci]

tests/Browser/README.md

@@ -14,11 +14,15 @@ INSTALLATION
 
 Installation:
 
-1. Add `"laravel/dusk": "~5.7.0"` to your composer.json file and run `composer update`.
+0. Note that the suite has been tested with PHP 7.3 and 7.4.
+1. Install Laravel Dusk with all dependencies.
+```
+composer require "laravel/dusk:~5.7.0"
+```
 2. Install Chrome WebDriver for the version of Chrome/Chromium in your system. Yes,
    you have to have Chrome/Chromium installed.
 ```
-php tests/Browser/install.php [version]`
+php tests/Browser/install.php [version]
 ```
 3. Configure the test account and Roundcube instance.
 

tests/Browser/install.php

@@ -35,7 +35,8 @@ class Installer extends Laravel\Dusk\Console\ChromeDriverCommand
      */
     public function install($version = null)
     {
-        $version = trim($this->getUrl(sprintf($this->versionUrl, $version ?: $this->latestVersion())));
+        $version = $version ? preg_replace('/\..*/', '', $version) : $this->latestVersion();
+        $version = trim($this->getUrl(sprintf($this->versionUrl, $version)));
         $currentOS = Laravel\Dusk\OperatingSystem::id();
 
         foreach ($this->slugs as $os => $slug) {