Fixes #50 Add plugin outputs which contain release information.

src/Outputs.ts

@@ -0,0 +1,14 @@
+import * as core from '@actions/core';
+import {ReleaseData} from "./Releases";
+
+export interface Outputs {
+    applyReleaseData(releaseData: ReleaseData): void
+}
+
+export class CoreOutputs implements Outputs {
+    applyReleaseData(releaseData: ReleaseData) {
+        core.setOutput('id', releaseData.id)
+        core.setOutput('html_url', releaseData.html_url)
+        core.setOutput('upload_url', releaseData.upload_url)
+    }
+}