feat: Add configurable timeouts

[TheRealAgentK]

feat: #319 - Missing timeouts

Description 📝

• Fixes Transport: Timeouts missing #319 and possibly improve or fix Question: any way to abort long-running send call? #311 (to be seen)
• Adds timeout as an option and an explicit default HTTP timeout of 5000ms
• Changes transport layer behaviour to destroy the request after various lifecycle events, in particular when the transport promise was completed successfully. This works around the default behaviour of http and https modules in Node to not stop a request even when it runs into a timeout
• Unrelated change in the debug logs for breadcrumbs

Type of change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• This change requires a documentation update

Updates

👉 Changed TS types
👉 Changes to transport layer
👉 Introduced new option
👉 Added tests to the mocking test bed
👉 TDB: Update documentation

Test plan 🧪

The easiest way to test under RL scenarios is with the express sample app. Set an API key and then configure raygun.client.js with options such as for example:

var raygunClient = new raygun.Client().init({
  apiKey: config.Raygun.Key,
  timeout: 10000,
  batch: true,
  batchFrequency: 10000
});

Author to check 👓

• Project and all contained modules builds successfully
• Self-/dev-tested
• Unit/UI/Automation/Integration tests provided where applicable
• Code is written to standards
• Appropriate documentation written (code comments, internal docs)

Reviewer to check ✔️

• Project and all contained modules builds successfully
• Change has been dev-/reviewer-tested, where possible
• Unit/UI/Automation/Integration tests provided where applicable
• Code is written to standards
• Appropriate documentation written (code comments, internal docs)

[miquelbeltran]

Overall looks good! I think it can be simplified a bit if the RaygunOptions get unified to a single config property for timeout.

Also, we should document this option in the README.md before merging.

[TheRealAgentK]

@miquelbeltran This is complete now and all PR comments resolved. Feel free to re-review.

[miquelbeltran]

LGTM!