feat: Added a mutable Bugsnag.context property

[robinmacharg]

Goal

Add a mutable context property to Bugsnag.

Design

Simple passthrough to the equivalent BugsnagConfiguration property.

Changeset

The Bugsnag class.

Tests

Unit tests that top-level manipulation affected the Configuration value as expected.

Review

Outstanding Questions

Concurrency concerns are deferred to the underlying Configuration property.

• 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

[kattrali]

Nice one!