feat: Use AllisonV2 by default

fix: update test with new wording

fix: remove DOWNLOAD_SECRET 🔥

feat: add a secret to prevent users from using the API directly

feat: update api path

fix(test): integration test (watson-developer-cloud#105)

* wip

* wip

* fix for SSML label

* voices updated to point to pprd (dallas)

* indentation fixes

* fix for the integration test

* fix(test): syntax error

Merge pull request watson-developer-cloud#100 from watson-developer-c…

…loud/fix-91

Align audio element with input text and update README

feat: Add semantic releases

Release v1.1.5