fix: mapping measurement with primitive float

[bednar]

Closes #293

Proposed Changes

Fixed mapping primitive floats into LineProtocol.

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 #294 (b3253ee) into master (5ca93a5) will increase coverage by 0.06%.
The diff coverage is 100.00%.

@@             Coverage Diff              @@
##             master     #294      +/-   ##
============================================
+ Coverage     88.85%   88.92%   +0.06%     
  Complexity      473      473              
============================================
  Files           149      149              
  Lines          5987     5988       +1     
  Branches        289      290       +1     
============================================
+ Hits           5320     5325       +5     
+ Misses          581      580       -1     
+ Partials         86       83       -3     

Impacted Files	Coverage Δ
...om/influxdb/client/internal/MeasurementMapper.java	97.33% <100.00%> (+5.44%)	⬆️

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[rhajek]

LGTM