added missing new line in generated code

Author: bandaloo

lib/generate.js

@@ -193,7 +193,7 @@
         output += parser.customTokens.map(function (token) { return "declare var " + token + ": any;\n" }).join("")
         output += parser.body.join('\n');
         output += "\n";
-        output += "interface NearleyToken {";
+        output += "interface NearleyToken {\n";
         output += "  value: any;\n";
         output += "  [key: string]: any;\n";
         output += "};\n";