dependencies and code cleanup (#2117)

* fix validation in new form layout

* pin mediatr to last oss version

* update dependencies

* cleanup code in core

* cleanup code in ffmpeg

* cleanup code in infra

* cleanup code in scanner

* cleanup code in application

* cleanup main code

* cleanup test code

* solution-wide code cleanup

ErsatzTV.Application/Artists/Mapper.cs

@@ -29,9 +29,10 @@ internal static class Mapper
         CultureInfo[] allCultures = CultureInfo.GetCultures(CultureTypes.NeutralCultures);
 
         return languages
-            .Map(
-                lang => allCultures.Filter(
-                    ci => string.Equals(ci.ThreeLetterISOLanguageName, lang, StringComparison.OrdinalIgnoreCase)))
+            .Map(lang => allCultures.Filter(ci => string.Equals(
+                ci.ThreeLetterISOLanguageName,
+                lang,
+                StringComparison.OrdinalIgnoreCase)))
             .Flatten()
             .Distinct()
             .ToList();