feat: add configuration option for ipv4 or ipv6, defaults to ipv4

[kevin0x90]

Closes #91

Proposed Changes

New configuration option for IPv4 or IPv6

Checklist

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

[bednar]

Thanks for your PR 👍
There are a few requirements that must be be satisfy before we accept the PR:

1. Update CHANGELOG.md
2. Update README.md with information how to configure ipv6:
   
3. Please add a documentation for new configuration option (ipVersion) in a Client constructor:
   

   influxdb-client-php/src/InfluxDB2/Client.php

   Line 58 in 6640e71

   public function __construct(array $options)

and also:

[codecov-commenter]

Codecov Report

Merging #92 (e319395) into master (7a3d92c) will decrease coverage by 0.64%.
The diff coverage is 0.00%.

@@             Coverage Diff              @@
##             master      #92      +/-   ##
============================================
- Coverage     82.24%   81.60%   -0.65%     
- Complexity      375      378       +3     
============================================
  Files            23       23              
  Lines           890      897       +7     
============================================
  Hits            732      732              
- Misses          158      165       +7     

Impacted Files	Coverage Δ
src/InfluxDB2/Client.php	93.54% <ø> (ø)
src/InfluxDB2/UdpWriter.php	38.23% <0.00%> (-9.92%)	⬇️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 7a3d92c...e319395. Read the comment docs.

[bednar]

Thanks again for your PR 👍