Dear Maintainer,

When I try to run:
   npm2deb create @babel/parser
the command fails:
   ...
   File "/usr/lib/python3/dist-packages/npm2deb/__init__.py", line 260, in
create_links
    orig = _os.path.normpath(self.json['bin'][script])
                             ~~~~~~~~~~~~~~~~^^^^^^^^
  TypeError: string indices must be integers, not 'str'

The reason of this error is that:
   self.json['bin'] == './bin/babel-parser.js'
in this particular case.

Here is a patch which restores the expected behavior:
-----------------8<-------------------------------------
diff --git a/npm2deb/__init__.py b/npm2deb/__init__.py
index ee3f29a..e2974da 100644
--- a/npm2deb/__init__.py
+++ b/npm2deb/__init__.py
@@ -255,9 +255,16 @@ and may not include tests.\n""")
         links = []
         dest = self.debian_dest
         if 'bin' in self.json:
-            for script in self.json['bin']:
-                orig = _os.path.normpath(self.json['bin'][script])
-                links.append("%s/%s usr/bin/%s" % (dest, orig, script))
+            if isinstance(self.json['bin'], list):
+                for script in self.json['bin']:
+                    orig = _os.path.normpath(self.json['bin'][script])
+                    links.append("%s/%s /usr/bin/%s" %
+                                 (self.name, orig, script))
+                else:
+                    script = self.json['bin']
+                    orig = _os.path.normpath(self.json['bin'])
+                    links.append("%s/%s /usr/bin/%s" %
+                                 (self.name, orig, script))
         if len(links) > 0:
             content = '\n'.join(links)
             utils.create_debian_file('links', content)
-----------------8<-------------------------------------

Best regards,                  Georges.