Release 4.0.0
About SwiftECC release 4.0.0:
The Hybrid Public Key Encryption (HPKE) functionality is removed from SwiftECC.
In order to achieve a cleaner division of functionality it is now implemented
in its own package SwiftHPKE.
The remaining functionality in SwiftECC is unchanged.
SwiftECC release 3.9.0 which includes HPKE still exists.