XREAD and go1.15

• support Go 1.14 and 1.15
• update the Check...() methods
• support for XREAD (thanks @pieterlexis)

test setup change

• Use SAN instead of CN in self signed cert for testing (thanks @johejo)
• Travis CI now tests against the most recent two versions of Go (thanks @johejo)
• changed unit and integration tests to compare raw payloads, not parsed payloads
• remove "redigo" dependency

HSTRLEN and AUTH

• added HSTRLEN
• minimal support for ACL users in AUTH

TLS and SetError

• added RunTLS(...)
• added SetError(...)

redis 6 and smaller fixes

• test against redis 6
• Lua json update (thanks @gsmith85)
• CLUSTER commands (thanks @kratisto)
• fix TOUCH
• fix a shutdown race conditionv

ZUNIONSTORE improvement

• ZUNIONSTORE now supports standard set types (thanks @wshirey)

TOUCH and custer commands

• support for TOUCH (thanks @cleroux)
• support for cluster and stream commands (thanks @kak-tus)

Lua concurrency

• make sure Lua code is executed concurrently
• add command GEORADIUSBYMEMBER, thanks to @kyeett

fixes for: lua, HSET, BLPOP

• globals protection for LUA code (thanks @vk-outreach)
• HSET update (thanks @carlgreen)
• fix BLPOP block on shutdown (thanks @Asalle)

basic streams, geodist, 128bit

• added XRANGE/XREVRANGE, XADD, and XLEN (thanks @skateinmars)
• added GEODIST
• improved precision for geohashes, closer to what real redis does
• use 128bit floats internally for INCRBYFLOAT and related (thanks @timnd)