feat: don't remove empty string and null of query string value

__tests__/__snapshots__/route.js.snap

@@ -78,7 +78,7 @@ Route {
 }
 `;
 
-exports[`Generate the URI of the route with params 1`] = `"/users/AWgrmJp1SjjuUM2bzZXM/projects?index=0&sort=asc"`;
+exports[`Generate the URI of the route with params 1`] = `"/users/AWgrmJp1SjjuUM2bzZXM/projects?array=a&array=b&empty=&index=0&nullValue&sort=asc"`;
 
 exports[`Initial Route with a parent. 1`] = `
 Route {

__tests__/route.js

@@ -68,7 +68,7 @@ test('Get an error on generating a route with a resolve key called "params".', (
 test('Generate the URI of the route with params', () => {
   const fakeRoute = new Route({
     name: 'web',
-    uri: '/users/{userId:[\\w-]{20}}/projects?index?sort',
+    uri: '/users/{userId:[\\w-]{20}}/projects?index?sort?nullValue?empty?array?undefinedValue',
     resolve: {
       user: ({userId}) => Promise.resolve({id: userId, name: 'User'}),
       projects: () => Promise.resolve([{id: 'AWgrmJp1SjjuUM2bzZXM', title: 'Project'}]),
@@ -79,6 +79,10 @@ test('Generate the URI of the route with params', () => {
     userId: 'AWgrmJp1SjjuUM2bzZXM',
     index: 0,
     sort: 'asc',
+    nullValue: null,
+    empty: '',
+    undefinedValue: undefined,
+    array: ['a', 'b'],
   });
   expect(uri).toMatchSnapshot();
 });

lib/route.js

@@ -104,7 +104,7 @@ module.exports = class Route {
       const value = params[key];
       if (uri.indexOf(`{${key}}`) >= 0) {
         uri = uri.replace(`{${key}}`, value);
-      } else if (this.uriParamKeys.indexOf(`?${key}`) >= 0 && (value || value === 0)) {
+      } else if (this.uriParamKeys.indexOf(`?${key}`) >= 0) {
         query[key] = value;
       }
     });