[CONFIG] [NPM] ESLint airbnb rules added.

Author: Gonzalo Diaz

.eslintrc

@@ -4,15 +4,22 @@
   "parserOptions": {
     "project": true
   },
-  "plugins": ["@typescript-eslint", "jest", "prettier"],
+  "plugins": [
+    "@typescript-eslint",
+    "import",
+    "jest",
+    "prettier"],
   "extends": [
     "eslint:recommended",
     "plugin:@typescript-eslint/eslint-recommended",
     "plugin:@typescript-eslint/recommended",
     // "plugin:@typescript-eslint/recommended-type-checked",
+    // "plugin:@typescript-eslint/stylistic-type-checked"
+    "airbnb-base",
     "prettier",
-    // "plugin:import/errors",
-    // "plugin:import/warnings",
+    "plugin:import/recommended",
+    "plugin:import/errors",
+    "plugin:import/warnings",
     "plugin:jest/all"
   ],
   "rules": {
@@ -21,6 +28,15 @@
     // CUSTOM OVERRIDES
     // TODO: remove no-restricted-syntax override and replace for...Of due
     /// "iterators/generators require regenerator-runtime, which is too heavyweight for this guide to allow them. Separately, loops should be avoided in favor of array iterations."
+    "import/extensions": [
+      "error",
+      "always",
+      {
+        "pattern": {
+          "ts": "never"
+        }
+      }
+    ],
     "no-restricted-syntax":           0,
     "no-console":                     "off",
     "no-underscore-dangle":           0,
@@ -37,5 +53,16 @@
         "@typescript-eslint/explicit-function-return-type": "error"
       }
     }
-  ]
+  ],
+  "settings": {
+    "import/parsers": {
+      "@typescript-eslint/parser": [".ts", ".tsx"]
+    },
+    "import/resolver": {
+      "typescript": {
+        "alwaysTryTypes": true, // always try to resolve types under `<root>@types` directory even it doesn"t contain any source code, like `@types/unist`
+        "project": "."
+      }
+    }
+  }
 }