ignore coverage output

deployable · deployable · commit 2bee8c9440d4 · 2018-03-07T01:56:29.000Z
diff --git a/.gitignore b/.gitignore
@@ -3,3 +3,4 @@ npm-debug.log
 docker/buildkite/buildkite-agent-*
 yarn-error.log
 .nyc_output/
+coverage/
