Made Swift Blob implements Equatable and Hashable
Made Swift Blob implements Equatable and Hashable

- When hiding the Objective-C API from Swift framework (#1646), we don’t do typealias to CBLBlob for Swift’s Blob anymore.

- Swift’s Blob needs to also implement Equatable and Hashable

#2082

couchbase/couchbase-lite-ios,couchbase/couchbase-lite-ios,couchbase/couchbase-lite-ios,couchbase/couchbase-lite-ios,couchbase/couchbase-lite-ios,couchbase/couchbase-lite-ios