Add type type description in Mnemonic._entropyChecksum
Add type type description in Mnemonic._entropyChecksum

bitpay/bitcore-mnemonic,bitjson/bitcore,bitpay/bitcore,bitjson/bitcore,martindale/bitcore,martindale/bitcore,bitpay/bitcore-mnemonic,martindale/bitcore,bitpay/bitcore,martindale/bitcore,bitpay/bitcore,bitjson/bitcore,bitjson/bitcore,bitpay/bitcore