fix(minimize-comments): provide better error on non-pull-request even…

…ts (#29)

If the action is used on an event that's not 'pull-request' there wont' be any comments to minimize, so provide a better error instead of a random failure out of graphql.

Future TODO: allow other event types (like maybe issue) that do have a way to look up comments

minimize-comments/main.ts

@@ -5,6 +5,13 @@ run();
 
 async function run() {
   try {
+    // Note: supporting other event types might require changing the query used
+    if (context.eventName !== "pull_request") {
+      throw new Error(
+        `This action is not supported for event of type '${context.eventName}'.`
+      );
+    }
+
     const token = getInput("github-token", { required: true });
     const bodyIncludesInput = getInput("body-includes", { required: true });
     const bodyStrings = bodyIncludesInput