Add linting

Author: parzhitsky

.eslintrc.json

@@ -0,0 +1,47 @@
+{
+  "root": true,
+  "env": {
+    "node": true,
+    "jest": true
+  },
+  "extends": [
+    "eslint:recommended",
+    "plugin:@typescript-eslint/recommended",
+    "standard-with-typescript"
+  ],
+  "plugins": ["@typescript-eslint"],
+  "parser": "@typescript-eslint/parser",
+  "parserOptions": {
+    "project": "./tsconfig.json"
+  },
+  "ignorePatterns": [
+    "node_modules",
+    "dist",
+    ".eslintrc.*"
+  ],
+  "rules": {
+    "comma-dangle": "off",
+    "@typescript-eslint/comma-dangle": ["error", "always-multiline"],
+
+    "indent": "off",
+    "@typescript-eslint/indent": ["error", 2, {
+      "SwitchCase": 1,
+      "flatTernaryExpressions": false,
+      "ignoredNodes": [
+        "PropertyDefinition[decorators]",
+        "TSUnionType",
+        "FunctionExpression[params]:has(Identifier[decorators])"
+      ]
+    }],
+
+    "@typescript-eslint/interface-name-prefix": "off",
+    "@typescript-eslint/space-before-function-paren": "off",
+    "@typescript-eslint/strict-boolean-expressions": "off",
+    "@typescript-eslint/no-misused-promises": "off",
+    "@typescript-eslint/restrict-template-expressions": "off", // FIXME: the rule seems to be broken
+    "@typescript-eslint/method-signature-style": "off",
+
+    "semi": "off",
+    "space-before-function-paren": "off"
+  }
+}