feat: github-api-url (#88)

closes #77

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Co-authored-by: Parker Brown <17183625+parkerbxyz@users.noreply.github.com>

tests/post-token-set.test.js

@@ -4,6 +4,10 @@ import { MockAgent, setGlobalDispatcher } from "undici";
 // https://docs.github.com/en/actions/using-workflows/workflow-commands-for-github-actions#sending-values-to-the-pre-and-post-actions
 process.env.STATE_token = "secret123";
 
+// inputs are set as environment variables with the prefix INPUT_
+// https://docs.github.com/en/actions/creating-actions/metadata-syntax-for-github-actions#example-specifying-inputs
+process.env["INPUT_GITHUB-API-URL"] = "https://api.github.com";
+
 // 1 hour in the future, not expired
 process.env.STATE_expiresAt = new Date(Date.now() + 1000 * 60 * 60).toISOString();