How should I use ES2020 in Angular?

Here is my tsconfig.json file:

    {
      "compileOnSave": false,
      "compilerOptions": {
        "baseUrl": "./",
        "outDir": "./dist/out-tsc",
        "sourceMap": true,
        "declaration": false,
        "module": "es2015",
        "moduleResolution": "node",
        "emitDecoratorMetadata": true,
        "experimentalDecorators": true,
        "importHelpers": true,
        "target": "es6",
        "typeRoots": [
          "node_modules/@types"
        ],
        "lib": [
          "es2018",
          "dom"
        ]
      }
    }

When I changed lib and target version from es2018 to es2020 it gives me below error:

tsconfig.json(13,15): error TS6046: Argument for '--target' option must be: 'es3', 'es5', 'es6', 'es2015', 'es2016', 'es2017', 'es2018', 'esnext'.

es2020 support was introduced in TypeScript 3.8.

You must upgrade to Angular 9.1 (or later) to use TypeScript 3.8.