Declare slash as dependency (#17)

Author: lukeed

package.json

@@ -43,8 +43,9 @@
     "nyc": "^5.6.0",
     "rimraf": "^2.5.2",
     "rollup": "^0.25.4",
-    "rollup-babel-lib-bundler": "^2.2.4",
-    "slash": "^1.0.0"
+    "rollup-babel-lib-bundler": "^2.2.4"
   },
-  "dependencies": {}
+  "dependencies": {
+    "slash": "^1.0.0"
+  }
 }