fix handling of npm token

Author: Steven Silvester

jupyter_releaser/npm.py

@@ -130,10 +130,12 @@ def extract_package(path):
 def handle_npm_config(npm_token):
     """Handle npm_config"""
     npmrc = Path(".npmrc")
-    registry = os.environ.get("NPM_REGISTRY", "registry.npmjs.org")
+    registry = os.environ.get("NPM_REGISTRY", "https://registry.npmjs.org/")
+    registry = registry.replace('https:', '')
+    registry = registry.replace('http:', '')
     text = f"registry={registry}"
     if npm_token:
-        text += f"\n///{registry}:_authToken={npm_token}"
+        text += f"\n{registry}:_authToken={npm_token}"
     if npmrc.exists():
         text = npmrc.read_text(encoding="utf-8") + text
     npmrc.write_text(text, encoding="utf-8")