Added support for SLOP

[devinsburke]

Added support for SLOP. Changed the int to an *int pointer (nullable) because SLOP 0 is a valid activity. The existing slop int attribute of the query struct was completely unused/unreferenced previously.

[sonarcloud[bot]]

Kudos, SonarCloud Quality Gate passed!

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[codecov[bot]]

Codecov Report

Merging #97 (d2e39e9) into master (f79df23) will decrease coverage by 0.13%. The diff coverage is 0.00%.

@@            Coverage Diff             @@
##           master      #97      +/-   ##
==========================================
- Coverage   76.77%   76.63%   -0.14%     
==========================================
  Files          13       13              
  Lines        1098     1100       +2     
==========================================
  Hits          843      843              
- Misses        198      199       +1     
- Partials       57       58       +1     

Impacted Files	Coverage Δ
redisearch/query.go	85.71% <0.00%> (-1.19%)	:arrow_down:

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[filipecosta90]

@devinsburke can we add a test for it?

[sonarcloud[bot]]

Kudos, SonarCloud Quality Gate passed!

0 Bugs
0 Vulnerabilities
0 Security Hotspots
0 Code Smells

No Coverage information
0.0% Duplication

[filipecosta90]

Merged @devinsburke . Thank you! I'll add some extra testing afterwards...