Bump NUnit from 4.2.2 to 4.3.0 in /src#615

dependabot[bot] merged 1 commit intomainVerifyTests/Verify.ImageSharp:mainfrom

dependabot/nuget/src/NUnit-4.3.0VerifyTests/Verify.ImageSharp:dependabot/nuget/src/NUnit-4.3.0Copy head branch name to clipboard