Add minor RediSearch features

[MacFJA]

Minor feature have been add to RediSeach 2.0.x

• RediSearch/RediSearch#1432 (v2.0.1)
• RediSearch/RediSearch#1625 (v2.0.2)
• RediSearch/RediSearch#1696 (v2.0.5)
• RediSearch/RediSearch#1696 (v2.0.6)
• RediSearch/RediSearch#1708 (v2.0.6) (c904606)
• RediSearch/RediSearch#2079 (v2.0.10) (c904606)
• RediSearch/RediSearch#1958 + RediSearch/RediSearch#2033 (v2.0.10) (c904606)
• RediSearch/RediSearch#2156 (v2.0.11) (c6a58bd)
• RediSearch/RediSearch#2188 (v2.0.12) (c6a58bd)