4.21.0 (2021-04-05)

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)