v0.9

fix: utils.has_value method always return false (#49)

* fix: has_value method always return false

* 1. fix v3.watchdir() opts args type error (#50)
2. fix prev_kv not decode

etcd v3 protocol support

fix:typo (#47)

* fix:typo

* fix: test case

v0.5

test: the CPU may be slow, need to wait a long time.

v0.3

change: updated the luarocks version to 0.3.

v0.2

luarocks: added the script to install by luarocks.

v0.1

doc: how to install the depend library.