Add SwiftUI view

[symes-s]

Added a SwiftUI wrapper for the UIView

See the preview for example usage

[symes-s]

This change was necessary to get the signature output to update correctly. If this is going to break things, an extra method could be added to the SwiftSignatureViewDelegate instead.

[lchamp]

@alankarmisra are you planning to review and merge soon?

Could you also fix the error caused by #75 (comment) and mentioned here: #76.
Indded the package is still targeting iOS12 and as such this gives the following error:

[lchamp]

Could you also fix the error caused by #75 (comment) and mentioned here: #76. Inde ed the package is still targeting iOS12 and as such this gives the following error:

PR #77 should solve this issue and changes the version to 3.2.6

With the current PR #73 of symes-s you could add SwiftUI support (could change version to 3.3.0).

[alankarmisra]

@symes-s I'll look into this for the next release. Been a bit overwhelmed with regular life :/