feat: query database optional

[Sciator]

Closes #25 Closes #26

Proposed Changes

Remove database argument from query and add it into client config as default:

client, err := influx.New(influx.Configs{
    HostURL:   url,
    AuthToken: token,
    Database: database,
})
// database not needed here, it's already defined in config
iterator, err := client.Query(context.Background(), query)

Checklist

• [x] CHANGELOG.md updated
• [x] Rebased/mergeable
• [x] A test has been added if appropriate
• [x] Tests pass
• [x] Commit messages are conventional
• [X] Sign CLA (if not already signed)

[codecov[bot]]

Codecov Report

Merging #27 (a02260a) into main (8193854) will increase coverage by 0.47%. The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main      #27      +/-   ##
==========================================
+ Coverage   78.59%   79.07%   +0.47%     
==========================================
  Files           8        8              
  Lines         528      540      +12     
==========================================
+ Hits          415      427      +12     
  Misses         97       97              
  Partials       16       16              

Impacted Files	Coverage Δ
influx/client.go	88.46% <ø> (ø)
influx/query.go	77.27% <100.00%> (+5.05%)	:arrow_up:

[alespour]

Superceded by #30 with #31