package.json: set editor.suggest.snippetsPreventQuickSuggestions to false

This enables autocompletion in function calls.

Fixes golang/vscode-go#839

Change-Id: If23c29fc84eed2a63970387002cfe4b4d013f6a0
Reviewed-on: https://go-review.googlesource.com/c/vscode-go/+/310754
Trust: Rebecca Stambler <rstambler@golang.org>
Run-TryBot: Rebecca Stambler <rstambler@golang.org>
TryBot-Result: kokoro <noreply+kokoro@google.com>
Reviewed-by: Hyang-Ah Hana Kim <hyangah@gmail.com>
diff --git a/package.json b/package.json
index 6a6b205..ffd0b4f 100644
--- a/package.json
+++ b/package.json
@@ -167,7 +167,8 @@
         "editor.formatOnSave": true,
         "editor.codeActionsOnSave": {
           "source.organizeImports": true
-        }
+        },
+        "editor.suggest.snippetsPreventQuickSuggestions": false
       }
     },
     "commands": [