accept multiple loaders in Register

[ktong]

No description provided.

[codecov]

Codecov Report

Attention: Patch coverage is 83.33333% with 1 lines in your changes are missing coverage. Please review.

Project coverage is 82.7%. Comparing base (7330da5) to head (42b834b).
Report is 5 commits behind head on main.

Additional details and impacted files

@@          Coverage Diff          @@
##            main    #309   +/-   ##
=====================================
  Coverage   82.7%   82.7%           
=====================================
  Files         61      61           
  Lines       2636    2636           
=====================================
  Hits        2182    2182           
  Misses       371     371           
  Partials      83      83           

Files	Coverage Δ
notifier/pubsub/notifier.go	83.3% <100.0%> (ø)
notifier/sns/notifier.go	95.5% <100.0%> (ø)
notifier/azservicebus/notifier.go	5.4% <50.0%> (ø)