Support to FT.CREATE PREFIX Parameter

[regisoliveira]

Support to FT.CREATE using PREFIX {count} {prefix} parameter.
https://oss.redislabs.com/redisearch/Commands/#ftcreate

[dengliming]

Thanks. Looks good to me. I will update the test later. Can you revert the version in pom.xml?

[codecov]

Codecov Report

Merging #17 (89d78e0) into master (be0deea) will decrease coverage by 0.20%.
The diff coverage is 33.33%.

@@             Coverage Diff              @@
##             master      #17      +/-   ##
============================================
- Coverage     60.44%   60.24%   -0.21%     
- Complexity      415      416       +1     
============================================
  Files            83       83              
  Lines          1575     1582       +7     
  Branches        135      136       +1     
============================================
+ Hits            952      953       +1     
- Misses          540      545       +5     
- Partials         83       84       +1     

Impacted Files	Coverage Δ	Complexity Δ
...ing/redismodule/redisearch/index/IndexOptions.java	43.75% <25.00%> (-5.04%)	15.00 <4.00> (+1.00)	⬇️
...ming/redismodule/redisearch/protocol/Keywords.java	100.00% <100.00%> (ø)	1.00 <0.00> (ø)

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