Add support for latest pipenv

Author: andidev

lib/pipenv.js

@@ -30,13 +30,12 @@ async function pipfileToRequirements() {
   try {
     let res;
     try {
-      res = await spawn(
-        'pipenv',
-        ['lock', '--requirements', '--keep-outdated'],
-        {
-          cwd: this.servicePath,
-        }
-      );
+      res = await spawn('pipenv', ['lock', '--keep-outdated'], {
+        cwd: this.servicePath,
+      });
+      res = await spawn('pipenv', ['requirements', '--hash'], {
+        cwd: this.servicePath,
+      });
     } catch (e) {
       if (
         e.stderrBuffer &&