Upgrade to version 5.0.5 of bitcoinjs-lib.

v5.0.5

Updated bitcoinjs-lib to version 5.0.5.

v4.0.3-1

Upgrade to version 4.0.3 of bitcoinjs-lib.

v4.0.2-3

Resolved Android build error from breaking changes in base-x version 3.0.5.

v4.0.2-2

Upgraded to version 4.0.2 of bitcoinjs-lib.

v4.0.1-3

Updated installation & usage instructions in README.md.

Renamed library to rn-bitcoinjs-lib & updated repository url in package.json.
Added tests from bitcoinjs-lib.