build: ignore npm@5 lock file

dougwilson · dougwilson · commit 4da394a1dac5 · 2019-04-25T23:32:22.000-04:00
diff --git a/.gitignore b/.gitignore
@@ -2,3 +2,4 @@
 coverage/
 node_modules/
 npm-debug.log
+package-lock.json
