Added `strict` option for RedirectPlugin not to modify request method…

[olexiyk]

… on statuses 300, 301, 302

Q	A
Bug fix?	no
New feature?	yes
BC breaks?	no
Deprecations?	no
Related tickets	fixes #207, partially #205
License	MIT

What's in this PR?

Resolves #207 by allowing to follow redirect specs for 301 and 302 more strictly - not modifying request method

Example Usage

        $plugins = $plugins ?? [
            new RedirectPlugin(['strict' => true]),
        ];

        $httpClient = (new PluginClientFactory())->createClient(
            Psr18ClientDiscovery::find(),
            $plugins
        );

Checklist

• [x] Updated CHANGELOG.md to describe BC breaks / deprecations | new feature | bugfix
• [x] Documentation pull request created (if not simply a bugfix)

To Do

• [ ] If the PR is not complete but you want to discuss the approach, list what remains to be done here

[dbu]

i tagged 2.4.0 with this feature. thanks for the contribution!

[olexiyk]

Thank you for quick action!