Release 0.1.1 (kinda a hotfix, because of linux dependencies)

Hi there, the most important thing is the change from generating the captcha by accessing CaptchaBackup to GenerateCaptchaContent() and the fact that this is kind of a hotfix, because of the error that you would get when using this on a linux machine because of the missing package I included now.

Changes:

• Include of 'SkiaSharp.NativeAssets.Linux.NoDependencies' for linux
• Moved from property CaptchaBackup, to method GenerateCaptchaContent()
• New option to enable or disable the use of numbers inside the captcha
• Changed the image from png to jpg, to save a tiny bit of image size