document the options option.

huonw · huonw · commit 4e87c2d273f2 · 2018-10-17T10:29:23.000+11:00
diff --git a/README.md b/README.md
@@ -19,6 +19,10 @@ steps:
 
 The files (or globs) to run shellcheck on
 
+### `options`
+
+Any options to pass to shellcheck
+
 ## License
 
 MIT (see [LICENSE](LICENSE))
