Adds .NET Core 3 support.
Features
- Added .NET Core 3 support - reference Keyoti.RapidSpell.NETCore.dll in your .NET Core 3+ projects and license by calling Keyoti.RapidSpell.CoreLicensing.SetLicenseKey("<license key>");.
- ComboBox support added, please use the new AYTComboBox control for as you type spell checking in a ComboBox, you will need to add it to RapidSpellAsYouType the same way you do other textboxes (AddTextComponent method).
- Updated English dictionaries.
