feat: update flux-dsl

[bednar]

Closes #149

Proposed Changes

• aggregates now accept only a 'column' parameter refactor(stdlib/aggregates): aggregates now accept only a 'column' pa… flux#1142
• add offset parameter to limit operator

Checklist

• CHANGELOG.md updated
• Rebased/mergeable
• A test has been added if appropriate
• mvn test completes successfully
• Commit messages are in semantic format
• Sign CLA (if not already signed)

[codecov-commenter]

Codecov Report

Merging #150 into master will increase coverage by 0.08%.
The diff coverage is 100.00%.

@@             Coverage Diff              @@
##             master     #150      +/-   ##
============================================
+ Coverage     90.38%   90.46%   +0.08%     
+ Complexity      441      439       -2     
============================================
  Files           137      137              
  Lines          5388     5393       +5     
  Branches        204      206       +2     
============================================
+ Hits           4870     4879       +9     
+ Misses          441      439       -2     
+ Partials         77       75       -2     

Impacted Files	Coverage Δ	Complexity Δ
...va/com/influxdb/query/dsl/functions/FirstFlux.java	100.00% <ø> (ø)	2.00 <0.00> (-1.00)
...ava/com/influxdb/query/dsl/functions/LastFlux.java	100.00% <ø> (ø)	2.00 <0.00> (-1.00)
...dsl/src/main/java/com/influxdb/query/dsl/Flux.java	96.02% <100.00%> (-0.03%)	139.00 <8.00> (-1.00)
...va/com/influxdb/query/dsl/functions/CountFlux.java	100.00% <100.00%> (ø)	3.00 <1.00> (ø)
...va/com/influxdb/query/dsl/functions/LimitFlux.java	100.00% <100.00%> (ø)	4.00 <1.00> (+1.00)
...java/com/influxdb/query/dsl/functions/MaxFlux.java	100.00% <100.00%> (ø)	3.00 <1.00> (ø)
...ava/com/influxdb/query/dsl/functions/MeanFlux.java	100.00% <100.00%> (ø)	3.00 <1.00> (ø)
...java/com/influxdb/query/dsl/functions/MinFlux.java	100.00% <100.00%> (ø)	3.00 <1.00> (ø)
...ava/com/influxdb/query/dsl/functions/SkewFlux.java	100.00% <100.00%> (ø)	3.00 <1.00> (ø)
...a/com/influxdb/query/dsl/functions/SpreadFlux.java	100.00% <100.00%> (ø)	3.00 <1.00> (ø)
... and 3 more

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