Add: Support WIF (Wallet Important Format) testnet network
0.2.1
Fix: Some typo error
0.2.0
Now, It supports both Bitcoin `mainnet` and `testnet` network addresses.
0.1.1
Fix bugs
0.1.0
It supports both [No EC-multiply](https://github.com/bitcoin/bips/blob/master/bip-0038.mediawiki#encryption-when-ec-multiply-flag-is-not-used) and [EC-multiply](https://github.com/bitcoin/bips/blob/master/bip-0038.mediawiki#encryption-when-ec-multiply-mode-is-used) modes.