add unused vars config

Author: jakemhiller

packages/eslint-config/index.js

@@ -62,6 +62,19 @@ module.exports = {
             },
           },
         ],
+        '@typescript-eslint/no-unused-vars': [
+          'error',
+          {
+            vars: 'all',
+            varsIgnorePattern: '^_',
+            args: 'after-used',
+            argsIgnorePattern: '^_',
+            caughtErrors: 'none',
+            caughtErrorsIgnorePattern: '^_',
+            destructuredArrayIgnorePattern: '^_',
+            ignoreRestSiblings: true,
+          },
+        ],
       },
     },
   ],