eslint: enforce 4 spaces, disallows blank lines

.eslintrc

@@ -8,26 +8,32 @@
   },
   "extends": "eslint:recommended",
   "rules": {
-    "strict": 2,
+    "strict": "error",
+    "semi": "error",
+    "indent": "error",
+    "lines-between-class-members": "error",
     "comma-dangle": ["error", "always-multiline"],
-    "semi": 2,
-    "lines-between-class-members": 2,
     "no-multiple-empty-lines": ["error", { "max": 1 }],
-    "multiline-comment-style": [2, "separate-lines"],
-    "no-whitespace-before-property": 2,
-    "space-before-blocks": [2, "always"],
-    "brace-style": [2, "1tbs"],
+    "multiline-comment-style": ["error", "separate-lines"],
+    "no-whitespace-before-property": "error",
+    "space-before-blocks": ["error", "always"],
+    "brace-style": ["error", "1tbs"],
     "space-before-function-paren": ["error", "always"],
-    "block-spacing": [2, "always"],
-    "keyword-spacing": [2, { "before": true, "after": true }],
-    "object-curly-spacing": [2, "always"],
+    "block-spacing": ["error", "always"],
+    "keyword-spacing": ["error", { "before": true, "after": true }],
+    "object-curly-spacing": ["error", "always"],
     "eqeqeq": "error",
     "quotes": ["error", "single"],
-    "no-unused-vars": ["error", { "argsIgnorePattern": "^(since|params|limit)" }],
+    "no-unused-vars": ["error", { "argsIgnorePattern": "^(symbol|since|limit|params)" }],
     "new-parens": "error",
     "new-cap": "error",
     "no-var": "error",
     "prefer-const": "off",
     "no-warning-comments": "error",
+    "padding-line-between-statements": ["error",
+      {"blankLine": "never", "prev":"*", "next": "*" },
+      {"blankLine": "always", "prev":"directive", "next": "*" },
+      {"blankLine": "always", "prev":"*", "next": "cjs-export" },
+    ],
   }
 }