fix: close long pulling scoket when program shutdown

0.0.8

fix: close long pulling socket when program shutdown  (#17)

release 0.0.7

fix subscribe core dump (#14)

release 0.0.6

fix subscribe (#13)

release 0.0.5

fix compile (#12)

release 0.0.4

1. add get from cache;
2. no fetch if subscribed

release 0.0.3

fix ApolloClient GetProperties bugs

release 0.0.2

add properties tostring (#10)

release 0.0.1

first release