Always display dunder variables when using new language server (microsoft#2033)

Fixes microsoft#2013

Author: DonJayamanne

news/2 Fixes/2013.md

@@ -0,0 +1 @@
+Ensure dunder variables are always displayed in code completion when using the new language server.

package.json

@@ -1169,7 +1169,7 @@
  },
  "python.autoComplete.showAdvancedMembers": {
  "type": "boolean",
- "default": false,
+ "default": true,
  "description": "Controls appearance of methods with double underscores in the completion list.",
  "scope": "resource"
  },