Add ability to pass \OneLogin\Saml2\Auth::login optional parameters

[a-menshchikov]

Fix #69

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 98.02%. Comparing base (704cbf5) to head (f1b5ab7).
⚠️ Report is 2 commits behind head on 1.4.

Additional details and impacted files

Files with missing lines	Coverage Δ
src/Controller/Login.php	100.00% <100.00%> (ø)
src/DependencyInjection/Configuration.php	100.00% <100.00%> (ø)
...DependencyInjection/NbgrpOneloginSamlExtension.php	100.00% <100.00%> (ø)

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