test: write test case for -v flag

Author: jamesgeorge007

e2e/index.js

@@ -17,4 +17,5 @@ const matchSnapshot = async (t, arg) => {
 };
 
 test('shows help with -h flag', matchSnapshot, '-h');
-test('shows help with --help flag', matchSnapshot, '--help');
+test('shows help with --help flag', matchSnapshot, '--help');
+test('shows help with -v flag', matchSnapshot, '-v');

e2e/snapshots/index.js.md e2e/index.js.mde2e/snapshots/index.js.md renamed to e2e/index.js.md

@@ -48,6 +48,15 @@ Generated by [AVA](https://ava.li).
     Development:␊
       https://github.com/docsifyjs/docsify-cli/blob/master/CONTRIBUTING.md`
 
+## shows help with -v flag
+
+> Snapshot 1
+
+    `␊
+    docsify-cli version:␊
+      4.4.0␊
+    `
+
 ## shows up help message without any args
 
 > Snapshot 1