Add reference implementation

Author: eMaringolo

bip-0039.mediawiki

@@ -176,6 +176,9 @@ Rust:
 * https://github.com/maciejhirsz/tiny-bip39/
 * https://github.com/koushiro/bip0039-rs
 
+* Smalltalk:
+* https://github.com/eMaringolo/pharo-bip39mnemonic
+
 Swift:
 * https://github.com/CikeQiu/CKMnemonic
 * https://github.com/yuzushioh/WalletKit