Add support for AI.INFO

[dengliming]

for #1

[codecov]

Codecov Report

Merging #10 into master will increase coverage by 2.09%.
The diff coverage is 89.47%.

@@            Coverage Diff             @@
##           master      #10      +/-   ##
==========================================
+ Coverage   63.44%   65.54%   +2.09%     
==========================================
  Files           9        9              
  Lines         279      296      +17     
  Branches       38       42       +4     
==========================================
+ Hits          177      194      +17     
+ Misses         86       84       -2     
- Partials       16       18       +2     

Impacted Files	Coverage Δ
src/main/java/com/redislabs/redisai/RedisAI.java	70.83% <87.50%> (+2.08%)	⬆️
src/main/java/com/redislabs/redisai/Command.java	100.00% <100.00%> (ø)
src/main/java/com/redislabs/redisai/Keyword.java	100.00% <100.00%> (ø)
...n/java/com/redislabs/redisai/RedisAIException.java	100.00% <0.00%> (+100.00%)	⬆️

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[filipecosta90]

LGTM. Thank you @dengliming =)