fix: include snapshot files

.gitignore

@@ -2,7 +2,7 @@ node_modules
 lerna-debug
 npm-debug
 .DS_Store
-dist
+/dist
 
 # Logs
 logs

src/test/snapshots/dist/lib/addons/slack.test.js.md

@@ -0,0 +1,11 @@
+# Snapshot report for `dist/lib/addons/slack.test.js`
+
+The actual snapshot is saved in `slack.test.js.snap`.
+
+Generated by [AVA](https://avajs.dev).
+
+## Should call slack webhook
+
+> Snapshot 1
+
+    '{"username":"Unleash","icon_emoji":":unleash:","text":"some@user.com created feature toggle <http://some-url.com/#/features/strategies/some-toggle|some-toggle>\\n*Enabled*: no | *Type*: undefined | *Project*: undefined\\n*Activation strategies*: ```- name: default\\n```","channel":"#undefined","attachments":[{"actions":[{"name":"featureToggle","text":"Open in Unleash","type":"button","value":"featureToggle","style":"primary","url":"http://some-url.com/#/features/strategies/some-toggle"}]}]}'