Undefined array key "background" [#3419245]

Problem/Motivation

In Drupal Core 10.2.2 and drupal/bootstrap_styles 1.1.5 I receive the warning:
Warning: Undefined array key "background" in Drupal\bootstrap_styles\Plugin\BootstrapStyles\Style\BackgroundColor->build() (line 107 of modules/contrib/bootstrap_styles/src/Plugin/BootstrapStyles/Style/BackgroundColor.php).

Comment	File	Size	Author
#3	bootstrap_styles_undefined_array_key_3419245_1.patch	1.3 KB	o_timoshchuk

Issue fork bootstrap_styles-3419245

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bootstrap_styles-3419245 changes, plain diff MR !62
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