Description

TypeScript 5 announced and released (March 16th, 2023)

• https://devblogs.microsoft.com/typescript/announcing-typescript-5-0
• TypeScript 5.0 Iteration Plan microsoft/TypeScript#51362

and merged into React Native core (May 10th, 2023)

• Bump TypeScript in template from 4.8.4 to 5.0.4 facebook/react-native#36862

but we're delaying this since our MM shared ESLint config isn't compatible with v5 yet (still on ~4.8.4)
otherwise this will be introducing peer dependency warnings and potentially other incompatibilities

we're now ready since MM shared ESLint config TS v5 support (July 13th, 2023)
https://github.com/MetaMask/eslint-config/releases/tag/v12.1.0

Technical Details

Upgrade TS/ESLint devDeps first to support TS v5
or ESLint warns we're running an incompatible TS version
details: MetaMask/KeyringController#202 (comment)

Acceptance Criteria

TSC: 0 errors, 0-X (tolerated) warnings

Note TSC diagnostics stats

References

this can be a follow-up to

• ☂️ Fix remaining TS/TSX static type errors #5993
• TS check isn't working #4605

or before in order to fix errors and refactor while utilising TS v5 features