Bump Microsoft.Extensions.Options.ConfigurationExtensions from 2.2.0 to 3.1.19 in /src/Miningcore#21

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dependabot/nuget/src/Miningcore/dev/Microsoft.Extensions.Options.ConfigurationExtensions-3.1.19cryptoandcoffee/miningcore:dependabot/nuget/src/Miningcore/dev/Microsoft.Extensions.Options.ConfigurationExtensions-3.1.19Copy head branch name to clipboard