v0.1.3

upgrade to go1.14

v0.1.2

1. support sm2 ECDSA algorithm
2. add RecoverPubkey() API to recover public key from ECDSA signature

Remove dependencies

Remove dependencies of iotex-address and iotex-core, which were introduced by a unit test.

v0.1.0

Initial release of go pkgs used in iotexproject, including so far:

1. crypto
2. hash
3. throttle
4. util/httputil