Refactor: Rename Bugsnag.stopSession to Bugsnag.pauseSession

[robinmacharg]

Goal

Rename Bugsnag.stopSession to Bugsnag.pauseSession

Design

Simple rename. Search and replace.

Changeset

Just occurrences in Bugsnag and a single test.

Tests

There was no testing for this feature. Without refactoring to use dependency injection or mocking it's difficult to test the session pausing feature. For now there's a simple placeholder test that proves that the method exists.

Review

Outstanding Questions

• This pull request is ready for:
  • Initial review of the intended approach, not yet feature complete
  • Structural review of the classes, functions, and properties modified
  • Final review

• The correct target branch has been selected (master for fixes, next for
  features)
• Consistency across platforms for structures or concepts added or modified
• Consistency between the changeset and the goal stated above
• Internal consistency with the rest of the library - is there any overlap between existing interfaces and any which have been added?
• Usage friction - is the proposed change in usage cumbersome or complicated?
• Performance and complexity - are there any cases of unexpected O(n^3) when iterating, recursing, flat mapping, etc?
• Concurrency concerns - if components are accessed asynchronously, what issues will arise
• Thoroughness of added tests and any missing edge cases
• Idiomatic use of the language

[fractalwrench]

There are a few callsites which still use stopSession that need updating.

• Bugsnag
• BugsnagNotifier
• BugsnagSessionTracker

Additionally several of the mazerunner scenarios use the old stopSession syntax, or need renaming as a class (e.g. StoppedSessionScenario.swift)