Add support for RESP3

[uglide]

The issue to track progress and discussions about RESP3 support.

• RESP3: Establish RESP3 connection #1270
• RESP3: Protocol parser #1271
  • RESP3: Protocol parser: Move current parsing script into separate entity #1272
  • RESP3: Protocol parser: RESP3 parser entity #1273
    • RESP3: Protocol parser: RESP3 parser entity: Null type parser #1274
    • RESP3: Protocol parser: RESP3 parser entity: Double type parser #1275
    • RESP3: Protocol parser: RESP3 parser entity: Boolean type parser #1276
    • RESP3: Protocol parser: RESP3 parser entity: Blob error type parser #1277
    • RESP3: Protocol parser: RESP3 parser entity: Verbatim string type parser #1278
    • RESP3: Protocol parser: RESP3 parser entity: Map type parser #1279
    • RESP3: Protocol parser: RESP3 parser entity: Set type parser #1280
    • RESP3: Protocol parser: RESP3 parser entity: Attribute type parser #1281
    • RESP3: Protocol parser: RESP3 parser entity: Push type parser #1282
    • RESP3: Protocol parser: RESP3 parser entity: Hello type parser #1283
    • RESP3: Protocol parser: RESP3 parser entity: Big number type parser #1284
• RESP3: Setup clients to handle RESP3 responses #1297
• RESP3: Commands integration tests #1296
• RESP3: Sharded PubSub #1302
• RESP3: Push notifications #1308

[chayim]

redis/jedis#2103

[chayim]

Remember to consider redis/redis-specifications#12

[tillkruss]

Actually forced to support some of the RESP3 responses here: d733e87

[tillkruss]

Loosened some test for v3 compatiblity: 1fbbe1f