Treat messages of level note as info

Treat the messages of type `note` as type `info`, otherwise they would be
treated as error when displayed to the user. Currently, Shellcheck treats
any message that is not `error` or `warning` as a `note`.

Closes #96

Author: lucasdf

lib/main.js

@@ -63,7 +63,7 @@ export default {
           const messages = [];
           let match = regex.exec(output);
           while (match !== null) {
-            const type = match[3];
+            const type = match[3] !== 'note' ? match[3] : 'info';
             if (showAll || type === 'warning' || type === 'error') {
               const line = Number.parseInt(match[1], 10) - 1;
               const col = Number.parseInt(match[2], 10) - 1;