use tsc stronger checks for unused vars

.eslintrc.json

@@ -32,7 +32,8 @@
     }],
     "@typescript-eslint/no-object-literal-type-assertion": ["error", {
       "allowAsParameter": true
-    }]
+    }],
+    "@typescript-eslint/no-unused-vars": "off"
   },
   "env": {
     "es6": true,

tsconfig.json

@@ -5,6 +5,8 @@
 		"declaration": true,
 		"declarationDir": "types",
 		"noImplicitThis": true,
+		"noUnusedLocals": true,
+		"noUnusedParameters": true,
 		"noEmitOnError": true,
 		"lib": [
 			"es5",