feat: add retry (#79)

resolves #71

- Add p-retry library
- Extract logic to new functions to improve the usage of retry logic

tests/snapshots/index.js.md

@@ -56,6 +56,21 @@ Generated by [AVA](https://avajs.dev).
 
     ''
 
+## main-token-get-owner-set-repo-fail-response.test.js
+
+> stderr
+
+    ''
+
+> stdout
+
+    `owner and repositories set, creating token for repositories "failed-repo" owned by "actions"␊
+    Failed to create token for "failed-repo" (attempt 1): GitHub API not available␊
+    ::add-mask::ghs_16C7e42F292c6912E7710c838347Ae178B4a␊
+    ␊
+    ::set-output name=token::ghs_16C7e42F292c6912E7710c838347Ae178B4a␊
+    ::save-state name=token::ghs_16C7e42F292c6912E7710c838347Ae178B4a`
+
 ## main-token-get-owner-set-repo-set-to-many.test.js
 
 > stderr
@@ -98,6 +113,21 @@ Generated by [AVA](https://avajs.dev).
     ::set-output name=token::ghs_16C7e42F292c6912E7710c838347Ae178B4a␊
     ::save-state name=token::ghs_16C7e42F292c6912E7710c838347Ae178B4a`
 
+## main-token-get-owner-set-to-user-fail-response.test.js
+
+> stderr
+
+    ''
+
+> stdout
+
+    `repositories not set, creating token for all repositories for given owner "smockle"␊
+    Failed to create token for "smockle" (attempt 1): GitHub API not available␊
+    ::add-mask::ghs_16C7e42F292c6912E7710c838347Ae178B4a␊
+    ␊
+    ::set-output name=token::ghs_16C7e42F292c6912E7710c838347Ae178B4a␊
+    ::save-state name=token::ghs_16C7e42F292c6912E7710c838347Ae178B4a`
+
 ## main-token-get-owner-set-to-user-repo-unset.test.js
 
 > stderr