Add compatibility to Microsoft Edge

[zxy19]

Default string field with length 255 is too short for Microsoft Edge, which uses endpoint url up to 500 characters long.
Change length of field endpoint in table push_subscriptions to 1024.

[DellZHackintosh]

I'm so glad to see that - I have distressed on Microsoft Edge that can never receive the notifications for a long time. 👍
Where did you find the documents for this?

[zxy19]

I tried to look up the description of the URL on Microsoft's website, but I got nothing but a statement that "URLs should be treated as black boxes"😟. So I checked the URLs posted in Devtool and compared them with the database, and finally found the problem.
I thought it would be a good idea to reserve some space in order to avoid problems once other browsers use longer URLs (since endpoint URLs don't seem to be specified), so I set it to 1024 characters.

In current version it can be seen that the Endpoint URL stored in database is much shorter than in the post request the browser had sent.So that once Flarum tries to push notice then the webpush library will receive a 404 error and treat the URL as outdated.

[DellZHackintosh]

That's funny, when the debug mode is enabled, it told me that notifications have sent to my Edge🤣🤣🤣, maybe we had never consider this situation.
Anyway, thanks for your finding. 👍I'm excited to be able to receive notifications soon. 😊

By the way, this PR seems only changed the tables that from previous version - is that necessary to do more work to create a table with correct length for the new installations?

[askvortsov1]

By the way, this PR seems only changed the tables that from previous version - is that necessary to do more work to create a table with correct length for the new installations?

All migrations run on new installs, so this should work fine once it's merged.

[DellZHackintosh]

Has this PR tested on MSEdge?

[zxy19]

Has this PR tested on MSEdge?

Yes, with verion 126.0.2592.81 on my computer.