Bump coverlet.msbuild from 3.0.2 to 3.0.3#15

dependabot[bot] wants to merge 1 commit intomasterbert2/Nullable.Extensions:masterfrom

dependabot/nuget/coverlet.msbuild-3.0.3bert2/Nullable.Extensions:dependabot/nuget/coverlet.msbuild-3.0.3Copy head branch name to clipboard