Update eslint config

Author: tshemsedinov

Diff for: .eslintignore

@@ -0,0 +1 @@
+node_modules/

Diff for: .eslintrc.json

@@ -6,7 +6,10 @@
   },
   "extends": "eslint:recommended",
   "parserOptions": {
-    "ecmaVersion": 2018
+    "ecmaVersion": 2020
+  },
+  "globals": {
+    "BigInt": true
   },
   "rules": {
     "indent": [
@@ -25,7 +28,6 @@
       "error",
       "always"
     ],
-    "no-console": "off",
     "no-loop-func": [
       "error"
     ],
@@ -113,6 +115,9 @@
     "new-parens": [
       "error"
     ],
+    "no-lonely-if": [
+      "error"
+    ],
     "no-trailing-spaces": [
       "error"
     ],
@@ -208,7 +213,7 @@
     ],
     "arrow-parens": [
       "error",
-      "as-needed"
+      "always"
     ],
     "arrow-body-style": [
       "error",
@@ -260,4 +265,4 @@
       "never"
     ]
   }
-}
+}