Add path seperator

This avoid permission issues for users that cannot create files in "/",  like "/tmpXXXX". It will generate "/tmp/XXX" instead.

Author: rtarsimi

myFetch.js

@@ -3,6 +3,7 @@
 const os = require('os');
 var path = require('path');
 var fs = require('fs');
+var { sep } = require('path');
 
 function getFetcher(u) {
     if(u.protocol === 'https:') return require('https');
@@ -29,7 +30,7 @@ function myFetch(fullUrl) {
             } else if(res.statusCode !== 200) {
                 return reject(Error(`Bad status code ${res.statusCode}`));
             }
-            const tmpd = fs.mkdtempSync(os.tmpdir());
+            const tmpd = fs.mkdtempSync(`${os.tmpdir()}${sep}`);
             const tmpf = path.join(tmpd, 'icu-download.zip');
             let gotSoFar = 0;
             console.dir(tmpd);
@@ -55,4 +56,4 @@ function myFetch(fullUrl) {
     });
 }
 
-module.exports = myFetch;
+module.exports = myFetch;