Update typescript-eslint monorepo to v4.21.0

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
@typescript-eslint/eslint-plugin	4.20.0 -> 4.21.0
@typescript-eslint/parser	4.20.0 -> 4.21.0

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Release Notes

typescript-eslint/typescript-eslint

v4.21.0

Compare Source

Bug Fixes

• eslint-plugin: [no-type-alias] consider keyof as an alias (#​3242) (329ef02)
• eslint-plugin: [no-unnecessary-type-assertion] correct bad fix for angle bracket assertion (#​3244) (265a039)
• eslint-plugin: [restrict-plus-operands] consider template literal types as strings (#​3234) (ccfd68e)
• eslint-plugin: [strict-boolean-expressions] account for truthy literals (#​3236) (0913f40)
• eslint-plugin: always ignore assignments in no-unnecessary-type-assertion (#​3235) (0221476)

Features

• eslint-plugin: [no-unsafe-argument] add rule (#​3256) (b1aa7dc), closes #​791
• eslint-plugin: [no-unsafe-call][no-unsafe-member-access] improve report messages for this for noImplicitThis (#​3199) (b1b26c4)

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