Added aws/aws-dotnet-extensions-configuration

[priorax]

Review the Contributing Guidelines

Before submitting a pull request, verify it meets all requirements in the Contributing Guidelines.

Describe Why This Is Awesome

aws/aws-dotnet-extensions-configuration is awesome, because it allows developers to store application data such as passwords and secure strings in Parameter Store and retrieved and updated at run time. This library allows Parameter Store values to be pulled in as standard configuration to be able to be used with config files/environment variables, allowing for an easier developer experience

[codecov-io]

Codecov Report

Merging #178 into master will increase coverage by 0.03%. The diff coverage is n/a.

@@            Coverage Diff             @@
##           master     #178      +/-   ##
==========================================
+ Coverage   96.59%   96.62%   +0.03%     
==========================================
  Files           3        4       +1     
  Lines          88       89       +1     
==========================================
+ Hits           85       86       +1     
  Misses          3        3