Add async-aws/ses to composer

[nandogameiro]

Fixes #206 adding async-aws/ses package to composer

This issue was still happening even using the latest version of repman with symfony 5.2

There is a deprecation notice on amazon-mailer package which is triggered when async-aws/ses it's not installed
https://github.com/symfony/amazon-mailer/blob/5.x/Transport/SesTransportFactory.php#L43

Once I manually installed this package on my instance I could get AWS SES working sending emails through ap-southeast-2

Thanks

[codecov]

Codecov Report

Merging #418 (7f8a4a4) into master (2bd1971) will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##             master     #418   +/-   ##
=========================================
  Coverage     99.38%   99.38%           
  Complexity     1863     1863           
=========================================
  Files           297      297           
  Lines          5871     5871           
=========================================
  Hits           5835     5835           
  Misses           36       36           

---

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 2bd1971...7f8a4a4. Read the comment docs.

[akondas]

Thanks for this fix 🙏