Improve CI

[gingerbenw]

Goal

Reduce CI warnings and errors:

• remove duplicate mock in react native plugin tests
• update angular jest setup
• use LTS version of node in code coverage workflow
• use LTS version of node for linting and unit tests
• update browserslist

Outstanding

During npm run test:coverage (on CI)

Failed to collect coverage from /home/runner/work/bugsnag-js-performance/bugsnag-js-performance/packages/plugin-react-native-navigation/lib/index.ts
ERROR: A jest worker process (pid=3182) was terminated by another process: signal=SIGTERM, exitCode=null. Operating system logs may contain more information on why this occurred.
STACK: Error: A jest worker process (pid=3182) was terminated by another process: signal=SIGTERM, exitCode=null. Operating system logs may contain more information on why this occurred.
    at ChildProcessWorker._onExit (/home/runner/work/bugsnag-js-performance/bugsnag-js-performance/node_modules/jest-worker/build/workers/ChildProcessWorker.js:370:23)
    at ChildProcess.emit (node:events:508:28)
    at ChildProcess._handle.onexit (node:internal/child_process:294:12)```

[github-actions]

Browser bundle size

NPM build

	Package
Before	235.34 kB
After	235.34 kB
±	No change

CDN build

	Unminified	Minfied	Minified + gzipped
Before	119.42 kB	46.16 kB	13.29 kB
After	119.42 kB	46.16 kB	13.29 kB
±	No change	No change	No change

Code coverage

Coverage values did not change👌.

Total:

Lines	Branches	Functions	Statements
85.05%(+0.09%)	63.82%(+0%)	75.66%(+0.08%)	81.83%(+0.12%)

Generated against 0cfc35c on 13 March 2026 at 10:24:57 UTC