feat(rules): add import/no-unresolved rule

Original commit:
metarhia/jstp@06579df

Original commit message:

  lint: add import/no-unresolved ESLint rule

  PR-URL: metarhia/jstp#133
  Reviewed-By: Mykola Bilochub <nbelochub@gmail.com>

.eslintrc.yml

@@ -2,6 +2,8 @@ env:
   node: true
   es6: true
 extends: 'eslint:recommended'
+plugins:
+  - import
 rules:
   indent:
     - error
@@ -173,3 +175,6 @@ rules:
   template-curly-spacing:
     - error
     - never
+  import/no-unresolved:
+    - error
+    - commonjs: true

README.md

@@ -12,7 +12,7 @@ styleguide.
 1. Install ESLint, this config and required plugins:
 
    ```console
-   npm i -D eslint eslint-config-metarhia
+   npm i -D eslint eslint-plugin-import eslint-config-metarhia
    ```
 
 2. Add `"extends": "metarhia"` to your `.eslintrc`.

package.json

@@ -37,12 +37,14 @@
     "@commitlint/cli": "^3.2.0",
     "@commitlint/config-angular": "^3.1.1",
     "eslint": "^4.6.1",
+    "eslint-plugin-import": "^2.7.0",
     "husky": "^0.14.3",
     "remark-cli": "^4.0.0",
     "remark-preset-lint-metarhia": "^1.0.1",
     "standard-version": "^4.2.0"
   },
   "peerDependencies": {
-    "eslint": "^4.6.1"
+    "eslint": "^4.6.1",
+    "eslint-plugin-import": "^2.7.0"
   }
 }