build: ignore .npmrc

Keen Yee Liau · ayazhafiz · commit f34239f8ccea · 2020-04-29T14:26:17.000-07:00
npmrc is used to store permission token for publishing to wombat proxy.
The token must never be checked in.
diff --git a/.gitignore b/.gitignore
@@ -1,3 +1,4 @@
+.npmrc
 .vscode-test
 .DS_Store
 node_modules
