feat(outputs): app-slug and installation-id (#105)

It is convenient to use `https://api.github.com/users/$app_slug[bot]` to
obtain the corresponding account ID later.
Then build `Signed-off-by: $app_slug[bot]
<$id+$app_slug[bot]@users.noreply.github.com>`.

Currently, there is no Linux environment to build test snapshot files

tests/snapshots/index.js.md

@@ -28,6 +28,10 @@ Generated by [AVA](https://avajs.dev).
     ::add-mask::ghs_16C7e42F292c6912E7710c838347Ae178B4a␊
     ␊
     ::set-output name=token::ghs_16C7e42F292c6912E7710c838347Ae178B4a␊
+    ␊
+    ::set-output name=installation-id::123456␊
+    ␊
+    ::set-output name=app-slug::github-actions␊
     ::save-state name=token::ghs_16C7e42F292c6912E7710c838347Ae178B4a␊
     ␊
     ::set-output name=expiresAt::2016-07-11T22:14:10Z`
@@ -85,6 +89,10 @@ Generated by [AVA](https://avajs.dev).
     ::add-mask::ghs_16C7e42F292c6912E7710c838347Ae178B4a␊
     ␊
     ::set-output name=token::ghs_16C7e42F292c6912E7710c838347Ae178B4a␊
+    ␊
+    ::set-output name=installation-id::123456␊
+    ␊
+    ::set-output name=app-slug::github-actions␊
     ::save-state name=token::ghs_16C7e42F292c6912E7710c838347Ae178B4a␊
     ␊
     ::set-output name=expiresAt::2016-07-11T22:14:10Z`
@@ -101,6 +109,10 @@ Generated by [AVA](https://avajs.dev).
     ::add-mask::ghs_16C7e42F292c6912E7710c838347Ae178B4a␊
     ␊
     ::set-output name=token::ghs_16C7e42F292c6912E7710c838347Ae178B4a␊
+    ␊
+    ::set-output name=installation-id::123456␊
+    ␊
+    ::set-output name=app-slug::github-actions␊
     ::save-state name=token::ghs_16C7e42F292c6912E7710c838347Ae178B4a␊
     ␊
     ::set-output name=expiresAt::2016-07-11T22:14:10Z`
@@ -117,6 +129,10 @@ Generated by [AVA](https://avajs.dev).
     ::add-mask::ghs_16C7e42F292c6912E7710c838347Ae178B4a␊
     ␊
     ::set-output name=token::ghs_16C7e42F292c6912E7710c838347Ae178B4a␊
+    ␊
+    ::set-output name=installation-id::123456␊
+    ␊
+    ::set-output name=app-slug::github-actions␊
     ::save-state name=token::ghs_16C7e42F292c6912E7710c838347Ae178B4a␊
     ␊
     ::set-output name=expiresAt::2016-07-11T22:14:10Z`
@@ -133,6 +149,10 @@ Generated by [AVA](https://avajs.dev).
     ::add-mask::ghs_16C7e42F292c6912E7710c838347Ae178B4a␊
     ␊
     ::set-output name=token::ghs_16C7e42F292c6912E7710c838347Ae178B4a␊
+    ␊
+    ::set-output name=installation-id::123456␊
+    ␊
+    ::set-output name=app-slug::github-actions␊
     ::save-state name=token::ghs_16C7e42F292c6912E7710c838347Ae178B4a␊
     ␊
     ::set-output name=expiresAt::2016-07-11T22:14:10Z`
@@ -150,6 +170,10 @@ Generated by [AVA](https://avajs.dev).
     ::add-mask::ghs_16C7e42F292c6912E7710c838347Ae178B4a␊
     ␊
     ::set-output name=token::ghs_16C7e42F292c6912E7710c838347Ae178B4a␊
+    ␊
+    ::set-output name=installation-id::123456␊
+    ␊
+    ::set-output name=app-slug::github-actions␊
     ::save-state name=token::ghs_16C7e42F292c6912E7710c838347Ae178B4a␊
     ␊
     ::set-output name=expiresAt::2016-07-11T22:14:10Z`
@@ -166,6 +190,10 @@ Generated by [AVA](https://avajs.dev).
     ::add-mask::ghs_16C7e42F292c6912E7710c838347Ae178B4a␊
     ␊
     ::set-output name=token::ghs_16C7e42F292c6912E7710c838347Ae178B4a␊
+    ␊
+    ::set-output name=installation-id::123456␊
+    ␊
+    ::set-output name=app-slug::github-actions␊
     ::save-state name=token::ghs_16C7e42F292c6912E7710c838347Ae178B4a␊
     ␊
     ::set-output name=expiresAt::2016-07-11T22:14:10Z`
@@ -182,6 +210,10 @@ Generated by [AVA](https://avajs.dev).
     ::add-mask::ghs_16C7e42F292c6912E7710c838347Ae178B4a␊
     ␊
     ::set-output name=token::ghs_16C7e42F292c6912E7710c838347Ae178B4a␊
+    ␊
+    ::set-output name=installation-id::123456␊
+    ␊
+    ::set-output name=app-slug::github-actions␊
     ::save-state name=token::ghs_16C7e42F292c6912E7710c838347Ae178B4a␊
     ␊
     ::set-output name=expiresAt::2016-07-11T22:14:10Z`
@@ -198,6 +230,10 @@ Generated by [AVA](https://avajs.dev).
     ::add-mask::ghs_16C7e42F292c6912E7710c838347Ae178B4a␊
     ␊
     ::set-output name=token::ghs_16C7e42F292c6912E7710c838347Ae178B4a␊
+    ␊
+    ::set-output name=installation-id::123456␊
+    ␊
+    ::set-output name=app-slug::github-actions␊
     ::save-state name=token::ghs_16C7e42F292c6912E7710c838347Ae178B4a␊
     ␊
     ::set-output name=expiresAt::2016-07-11T22:14:10Z`