fix(parser): make SNS subject field nullish (#3415)

Co-authored-by: Alexander Schueren <[email protected]>

Author: dreamorosi

Diff for: packages/parser/src/schemas/sns.ts

@@ -9,7 +9,7 @@ const SnsMsgAttribute = z.object({
  * Zod schema for a SNS event notification record.
  */
 const SnsNotificationSchema = z.object({
-  Subject: z.string().optional(),
+  Subject: z.string().nullish(),
   TopicArn: z.string(),
   UnsubscribeUrl: z.string().url(),
   UnsubscribeURL: z.string().url().optional(),

Diff for: packages/parser/tests/events/snsSqsEvent.json

@@ -3,7 +3,7 @@
     {
       "messageId": "79406a00-bf15-46ca-978c-22c3613fcb30",
       "receiptHandle": "AQEB3fkqlBqq239bMCAHIr5mZkxJYKtxsTTy1lMImmpY7zqpQdfcAE8zFiuRh7X5ciROy24taT2rRXfuJFN/yEUVcQ6d5CIOCEK4htmRJJOHIyGdZPAm2NUUG5nNn2aEzgfzVvrkPBsrCbr7XTzK5s6eUZNH/Nn9AJtHKHpzweRK34Bon9OU/mvyIT7EJbwHPsdhL14NrCp8pLWBiIhkaJkG2G6gPO89dwHtGVUARJL+zP70AuIu/f7QgmPtY2eeE4AVbcUT1qaIlSGHUXxoHq/VMHLd/c4zWl0EXQOo/90DbyCUMejTIKL7N15YfkHoQDHprvMiAr9S75cdMiNOduiHzZLg/qVcv4kxsksKLFMKjwlzmYuQYy2KslVGwoHMd4PD",
-      "body": "{\n  \"Type\" : \"Notification\",\n  \"MessageId\" : \"d88d4479-6ec0-54fe-b63f-1cf9df4bb16e\",\n  \"TopicArn\" : \"arn:aws:sns:eu-west-1:231436140809:powertools265\",\n  \"Message\" : \"{\\\"message\\\": \\\"hello world\\\", \\\"username\\\": \\\"lessa\\\"}\",\n  \"Timestamp\" : \"2021-01-19T10:07:07.287Z\",\n  \"SignatureVersion\" : \"1\",\n  \"Signature\" : \"tEo2i6Lw6/Dr7Jdlulh0sXgnkF0idd3hqs8QZCorQpzkIWVOuu583NT0Gv0epuZD1Bo+tex6NgP5p6415yNVujGHJKnkrA9ztzXaVgFiol8rf8AFGQbmb7RsM9BqATQUJeg9nCTe0jksmWXmjxEFr8XKyyRuQBwSlRTngAvOw8jUnCe1vyYD5xPec1xpfOEGLi5BqSog+6tBtsry3oAtcENX8SV1tVuMpp6D+UrrU8xNT/5D70uRDppkPE3vq+t7rR0fVSdQRdUV9KmQD2bflA1Dyb2y37EzwJOMHDDQ82aOhj/JmPxvEAlV8RkZl6J0HIveraRy9wbNLbI7jpiOCw==\",\n  \"SigningCertURL\" : \"https://sns.eu-west-1.amazonaws.com/SimpleNotificationService-010a507c1833636cd94bdb98bd93083a.pem\",\n  \"UnsubscribeURL\" : \"https://sns.eu-west-1.amazonaws.com/?Action=Unsubscribe&SubscriptionArn=arn:aws:sns:eu-west-1:231436140809:powertools265:15189ad7-870e-40e5-a7dd-a48898cd9f86\"\n}",
+      "body": "{\n  \"Type\" : \"Notification\",\n  \"MessageId\" : \"d88d4479-6ec0-54fe-b63f-1cf9df4bb16e\",\n  \"TopicArn\" : \"arn:aws:sns:eu-west-1:231436140809:powertools265\",\n  \"Subject\" : null,\n  \"Message\" : \"{\\\"message\\\": \\\"hello world\\\", \\\"username\\\": \\\"lessa\\\"}\",\n  \"Timestamp\" : \"2021-01-19T10:07:07.287Z\",\n  \"SignatureVersion\" : \"1\",\n  \"Signature\" : \"tEo2i6Lw6/Dr7Jdlulh0sXgnkF0idd3hqs8QZCorQpzkIWVOuu583NT0Gv0epuZD1Bo+tex6NgP5p6415yNVujGHJKnkrA9ztzXaVgFiol8rf8AFGQbmb7RsM9BqATQUJeg9nCTe0jksmWXmjxEFr8XKyyRuQBwSlRTngAvOw8jUnCe1vyYD5xPec1xpfOEGLi5BqSog+6tBtsry3oAtcENX8SV1tVuMpp6D+UrrU8xNT/5D70uRDppkPE3vq+t7rR0fVSdQRdUV9KmQD2bflA1Dyb2y37EzwJOMHDDQ82aOhj/JmPxvEAlV8RkZl6J0HIveraRy9wbNLbI7jpiOCw==\",\n  \"SigningCertURL\" : \"https://sns.eu-west-1.amazonaws.com/SimpleNotificationService-010a507c1833636cd94bdb98bd93083a.pem\",\n  \"UnsubscribeURL\" : \"https://sns.eu-west-1.amazonaws.com/?Action=Unsubscribe&SubscriptionArn=arn:aws:sns:eu-west-1:231436140809:powertools265:15189ad7-870e-40e5-a7dd-a48898cd9f86\"\n}",
       "attributes": {
         "ApproximateReceiveCount": "1",
         "SentTimestamp": "1611050827340",