CR: Fix --issue-type option to handle single values

Commander.js returns a string for single values and an array for
multiple values with variadic options. Normalize to array before
iterating to prevent iterating over characters of a string.

Author: igor-makarov

src/commands/crashlytics-reports-get.ts

@@ -155,15 +155,18 @@ export const command = new Command("crashlytics:reports:get <report>")
       filter.issueVariantId = options.issueVariantId;
     }
     if (options.issueType) {
-      for (const issueType of options.issueType) {
+      const issueTypes = Array.isArray(options.issueType)
+        ? options.issueType
+        : [options.issueType];
+      for (const issueType of issueTypes) {
         const issueTypeUpper = issueType.toUpperCase();
         if (!VALID_ISSUE_TYPES.includes(issueTypeUpper as (typeof VALID_ISSUE_TYPES)[number])) {
           throw new FirebaseError(
             `Invalid issue type "${issueType}". Must be one of: ${VALID_ISSUE_TYPES.join(", ")}`,
           );
         }
       }
-      filter.issueErrorTypes = options.issueType.map((e) => e.toUpperCase()) as (
+      filter.issueErrorTypes = issueTypes.map((e) => e.toUpperCase()) as (
         | "FATAL"
         | "NON_FATAL"
         | "ANR"