Fix: Query strings fails for falsifying booleans and numbers

package.json

@@ -1,6 +1,6 @@
 {
   "name": "request-promise-lite",
-  "version": "0.5.1",
+  "version": "0.5.2",
   "description": "Lightweight, promiseful http/https request client",
   "main": "lib/index.js",
   "repository": {

src/Request.js

@@ -38,7 +38,7 @@ export default class Request {
       const unparsedValues = map[key];
       let values;
 
-      if (!unparsedValues) {
+      if (typeof unparsedValues === 'undefined') {
         // TODO Check this - can we send keys that have values? request module thinks 'no'
         //return key;
         return '';

test/RequestSpec.js

@@ -53,6 +53,23 @@ describe('Request - test against httpbin.org', () => {
       });
   });
 
+  it('Supports booleans, strings, and numbers in query object', () => {
+    url = 'https://httpbin.org/get';
+    const qs = {
+      text: 'test text',
+      number: -1,
+      boolean: false,
+    };
+    request = new Request('GET', url, { json: true, qs: qs });
+
+    return request.run()
+      .then(response => {
+        expect(response.args.text).to.equal('test text');
+        expect(response.args.number).to.equal('-1');
+        expect(response.args.boolean).to.equal('false');
+      });
+  });
+
   it('Accepts custom headers', () => {
     url = 'https://httpbin.org/headers';
     headers = {