feat: Expose OutcomeDocument

[dinoboff]

Allow using an alternative http client or nodejs http(s) client with non default options.

• Add static methods to OutcomeDocument to create read/delete/replace outcome request body
• Refactor how the score language and the supported type are given to the Outcome Document.
• Expose the outcome service response parser

[coveralls]

Changes Unknown when pulling 379f9fa774d32bbcfaa229a05d277854e855f506 on dinoboff:feat/outcome-sign-request-method into ** on omsmith:master**.

[coveralls]

Changes Unknown when pulling 6ef92ec8017be6496497dd2e7affe92ab0606c7f on dinoboff:feat/outcome-sign-request-method into ** on omsmith:master**.

[coveralls]

Changes Unknown when pulling 3b5fb45ba3831ec0ce2bcb95d4654655ad4726c4 on dinoboff:feat/outcome-sign-request-method into ** on omsmith:master**.

[coveralls]

Changes Unknown when pulling 2347d2ea51bb11f67d9d93f16912acf48c4804d3 on dinoboff:feat/outcome-sign-request-method into ** on omsmith:master**.