bumped version

S3proxy retry fix (gmoon#36)

* eslint formatting

* added nock and sinon for testing

* eslint formatting

* gmoon#33 added a HeaderHandler module to consolidate the handling of headers for retries and errors

* gmoon#35 added head method

* gmoon#35 restored mock express

* gmoon#35 refactored HeaderHandler into a class

* gmoon#35 eslint --fix on examples/ files. Upgraded sam-app dependencies. Added sam-app unit test to Makefile

* gmoon#35 added benchmark tests for get and head, and an artillery suite for load testing

* gmoon#35 removed benchmark tests for now (failing on github actions), fixed artillery command

* gmoon#35 fixed npm run command

* gmoon#35 running sam local as part of github actions

* gmoon#35 running sam local as part of github actions

* gmoon#35 upgraded dependencies

* gmoon#35 updated documentation

* gmoon#35 updated documentation

1.3.1

added documentation for AWS.S3 options configuration