fix for timeseries which return double as string

[ashtul]

Broke with fix RedisTimeSeries/RedisTimeSeries#377

[codecov]

Codecov Report

Merging #59 into master will decrease coverage by 0.37%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master      #59      +/-   ##
==========================================
- Coverage   82.82%   82.44%   -0.38%     
==========================================
  Files           6        6              
  Lines         390      393       +3     
==========================================
+ Hits          323      324       +1     
- Misses         34       35       +1     
- Partials       33       34       +1     

Impacted Files	Coverage Δ
reply_parser.go	67.92% <100.00%> (-0.67%)	⬇️

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