Fix bugs in calling putConn()

Merge pull request #30 from jumpeiMano/feature/fix-put-bugs

Fix bugs in calling putConn()

Get lock in conn.reset()

Merge pull request #29 from jumpeiMano/feature/lock

Set lock in conn.reset()

Get lock of conn and fix typo

Merge pull request #28 from jumpeiMano/feature/lock

Get lock of conn and fix typo

Fix bugs

v1.5.1

Use RLock

Connection Pool v2

Merge pull request #26 from jumpeiMano/feature/connection-pool-v2

Connection pool v2

Close nc when conn is closed

Merge pull request #25 from jumpeiMano/feature/go-mod

Tweaks

Use go mod and golangci-lint

Merge pull request #24 from jumpeiMano/feature/go-mod

Use go mod and golangci-lint

Fix bugs

Merge pull request #23 from jumpeiMano/feature/fix-numOpen-bugs

Oh, I forgot so important things, "numOpen--"

Call context.WithTimeout() after call cp.conn()

Merge pull request #22 from jumpeiMano/feature/add-error-messages

Add logger and set timeout in newConn()

Call context.WithTimeout() after call cp.conn()

Merge pull request #21 from jumpeiMano/feature/context-timeout

Call context.WithTimeout() after call cp.conn()