Add hasString and hasURL method
These methods allows checking the content in clipboard without triggering UIPasteBoard notification for iOS 14+
chore: setup github actions (#76) by @Naturalclar
docs: replace CircleCI badge with GHA badge on README (#77) by @Naturalclar
feat: Expose hasString method for iOS 14+ (#73) by @gnardini
feat: add hasURL method (#78) @Naturalclar