remove dev-dep: chai-as-promised

.npmignore

@@ -0,0 +1 @@
+test/

test/lexical.js

@@ -1,6 +1,5 @@
 var chai = require("chai");
 var should = chai.should();
-chai.use(require("chai-as-promised"));
 
 var identifier = require('../lexical.js');