Enable no-extraneous-dependencies linter rule, #131

Author: rubensworks

.eslintrc

@@ -1,16 +1,20 @@
 {
   env: {
     node: true,
-    es6: true,
+    es6: true
   },
 
+  plugins: [
+    'eslint-plugin-import'
+  ],
+
   parserOptions: {
     ecmaVersion: 9,
     sourceType: "module"
   },
 
   globals: {
-    Promise: true,
+    Promise: true
   },
 
   rules: {
@@ -181,5 +185,18 @@
     space-unary-ops: 2,
     spaced-comment: [2, "always", { block: { markers: ["!"] } }],
     wrap-regex: 0,
+
+    // Imports
+    "import/no-extraneous-dependencies": "error"
   },
+
+  overrides: [
+    {
+      // Specific rules for test files
+      files: [ "packages/**/test/**/*-test.js" ],
+      rules: {
+        "import/no-extraneous-dependencies": "off"
+      }
+    }
+  ]
 }

package.json

@@ -11,6 +11,7 @@
     "chai": "^4.0.0",
     "coveralls": "^3.0.9",
     "eslint": "^7.0.0",
+    "eslint-plugin-import": "^2.22.0",
     "lerna": "^3.4.0",
     "manual-git-changelog": "^1.0.1",
     "mocha": "^8.0.0",