防止get请求参数值为false或0等特殊值会导致无法正确的传参

Merge pull request !146 from wugh/hotfix/gitee-issue_I2A5FU

@@ -25,7 +25,7 @@ service.interceptors.request.use(config => {
     for (const propName of Object.keys(config.params)) {
       const value = config.params[propName];
       var part = encodeURIComponent(propName) + "=";
-      if (value && typeof(value) !== "undefined") {
+      if (value !== null && typeof(value) !== "undefined") {
         if (typeof value === 'object') {
           for (const key of Object.keys(value)) {
             let params = propName + '[' + key + ']';