Add support for latest pipenv

Author: andidev

lib/pipenv.js

@@ -32,7 +32,14 @@ async function pipfileToRequirements() {
     try {
       res = await spawn(
         'pipenv',
-        ['lock', '--requirements', '--keep-outdated'],
+        ['lock', '--keep-outdated'],
+        {
+          cwd: this.servicePath,
+        }
+      );
+      res = await spawn(
+        'pipenv',
+        ['requirements', '--hash'],
         {
           cwd: this.servicePath,
         }