Fix lint/test errors

types/tabbable/index.d.ts

@@ -1,4 +1,4 @@
-// Type definitions for tabbable v3.1.1
+// Type definitions for tabbable 3.1
 // Project: https://github.com/davidtheclark/tabbable
 // Definitions by: Michael Swiger <https://github.com/mokkan>
 // Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
@@ -11,4 +11,4 @@ declare namespace T {
     }
 }
 
-export = T;
+export = T;

types/tabbable/tabbable-tests.ts

@@ -1,6 +1,6 @@
 import tabbable = require('tabbable');
 
-var el = document.createElement('div');
+const el = document.createElement('div');
 tabbable(el);
 tabbable(el, { includeContainer: true });
 

types/tabbable/tslint.json

@@ -0,0 +1,3 @@
+{
+    "extends": "dtslint/dt.json"
+}