dependency on javafx.util.Pair prevents running on OpenJDK

[ismoli]

io.cryptoapis.utils.Utils.java class is relying on javafx.util.Pair which is not part of OpenJDK, thus making it impossible to use this lib in such environments. Fails with java.lang.NoClassDefFoundError: javafx/util/Pair
And in general this kind of deps seems a bit strange as javafx is the gui module of java.

[dlvn]

I have a fork in my GitHub without javafx.util.Pair and using instead java.util.Map.Entry

@Crypto-APIs Let us know if we can submit a PR to fix this issue