Add stopSession() and resumeSession() to public API

[fractalwrench]

Goal

Adds the ability to stop and resume sessions. This prevents the handled/unhandled error count from incrementing when a session is in the stopped state, which may be desirable if a user manually tracks sessions and does not want crashes that occurred in the background to count towards their stability score.

Note: the first two commits of this changeset updates vendored code which has already passed review. It may be easier to review these changes in isolation by viewing this diff.

For reference, the PRs which add this functionality for Android/Cocoa can be found here:

bugsnag/bugsnag-android#429
bugsnag/bugsnag-cocoa#325

Changeset

• Updated bugsnag-android from 4.11.0 to 4.12.0
• Updated bugsnag-cocoa from 5.17.3 to 5.19.0
• Added stopSession() and resumeSession() to the JS API, which forward the call onto the NativeClient
• Updated TypeScript definition to include new methods
• Added inline code documentation for JS API
• Added stopSession() and resumeSession() implementations in the Android + Cocoa native package. These are invoked asychronously across the React Native bridge by the JS methods, and in turn invoke the appropriate method in bugsnag-android/bugsnag-cocoa
• Update autoCapture behaviour to call resumeSession rather than startSession (rationale described further in design doc)

Tests

I performed the following manual tests on the 'plain' example project on Android/iOS release builds (see contributing guide for instructions), by inspecting the payload sent to netcat:

• Handled error with started session has session info
• Handled error with stopped session has no session info
• Resuming session resumes the session
• Unhandled error with started session has session info
• Unhandled error with stopped session has no session info

Note: Mazerunner scenarios will be added in a separate PR, once implementation of this functionality on bugsnag-unity is complete.

[fractalwrench]

Thanks for the review - I have update the inline code docs to clarify when an error counts towards the stability score.

[bengourley]

Manually tested and it works as expected 👍

The only thing I would change is adding the session methods to the TypeScript app test/app.ts that is used to assert the types are correct. I already tried this out on my working copy and the tests pass but it would be helpful to catch any regressions:

 client.notify(new Error('flop'))
 client.setUser('123', 'B. Nag', 'bugs.nag@bugsnag.com')
 client.setUser(undefined, undefined, undefined)
 client.setUser()
+client.stopSession()
+client.startSession()
+client.resumeSession()