.eslintrc.json

{
  "parser": "@typescript-eslint/parser",
  "parserOptions": {
    "project": "./tsconfig.json"
  },
  "plugins": [
    "@typescript-eslint",
    "prettier"
  ],
  "extends": [
    "eslint:recommended",
    "plugin:@typescript-eslint/eslint-recommended",
    "plugin:@typescript-eslint/recommended",
    "kentcdodds/possible-errors",
    "kentcdodds/best-practices",
    "kentcdodds/es6/possible-errors",
    "kentcdodds/import",
    // "kentcdodds/jest",
    // prettier should be last
    "prettier",
    "prettier/@typescript-eslint",
    "plugin:prettier/recommended",
    "prettier/standard"
  ],
  "settings": {
    "import/resolver": {
      "node": {
        "paths": ["src"],
        "extensions": [".ts"]
      }
    }
  },
  "rules": {
    "semi": ["off"], // note you must disable the base rule as it can report incorrect errors
    "@typescript-eslint/semi": ["error", "never"],

    "key-spacing": ["error", {
        "align": {
          "afterColon" : true,
          "beforeColon": false,
          "on"         : "colon"
        },
        "singleLine": {
          "afterColon" : true,
          "beforeColon": false
        }
      }
    ],
    "max-len"        : ["error", 120, 4, { "ignoreComments": true }],
    "space-before-function-paren": 0,
    "space-in-parens"            : 2,
    "no-warning-comments": ["warn", { "terms": ["todo", "fixme"]}],
    "prettier/prettier": ["error", {
        "parser": "typescript",
        "singleQuote": true,
        "semi": false,
        "trailing": "all"
      }
    ]
  }
}
// "object-curly-newline"         : [
//   2, {
//     "ExportDeclaration": {
//       "minProperties": 3,
//       "multiline"    : true,
//     },
//     "ImportDeclaration": {
//       "consistent"   : true,
//       "minProperties": 2,
//       "multiline"    : true,
//     },
//     "ObjectExpression": {
//       "minProperties": 2,
//       "multiline"    : true,
//     },
//     "ObjectPattern": { "multiline": true },
//   },
// ],