Add withConn and set cmd errors more consistently

Use semantic import versioning

Feature/retry init conn

Add proper SingleConnPool implementation

Close single conn connection pool

Use DialContext by default

Use net.Dialer DialContext by default because go-redis supports
contexts.

Resolves #1101

Cancel sleep when context is cancelled

Fix poolSize and idleConnsLen when conn can't be created

Use unsafe StringToBytes to speedup StringCmd.Bytes

Add golangci-lint

Propagate context in Pipeline

Marshal time as RFC3339. Add StringCmd.Time helper.

Implement TxPipeline for Ring

Making LpushX and RpushX variadic

Add support for individual passwords for ring shards

Don't return a context from After* hooks

Change PubSub.Channel

Call all After* hooks and return first error

Add NewZWithKeyCmdResult to initialize ZWithKeyCmd for testing

Fix WithContext and add tests

Use Dialer in Sentinel failover when available

Fix cmdsInfo to create node

Add basic BITFIELD support

Inc StaleConns in ReapStaleConns

Use master / another slave node when current node is failing

Cleanup

Don't panic if multi bulk parser is nil

internal/pool: use min nonzero deadline

Check context.Done while waiting for a connection

Use Context.Deadline to set net.Conn deadline

Pass context to Dialer

add option for sentinel password

Allow passing context where possible

Rely on GO111MODULE

Feature/hook new

Handle -1 in DurationCmd

Mark node as loading in Cluster pipeline read

Add SentinelClient Ping, Monitor, Remove and Set funcs