fix: Test setupMigrations doesn't return false (#3113)
fix: Test setupMigrations doesn't return false (#3113)

`file_put_contents` can return 0 if there’s nothing to write in the
`applied_migrations.txt` file, which is equivalent to `false`. Since
there are no migrations yet, this is what happens. Because this value
(i.e. `0`) is tested next in the `app/install.php` file, the install
script was failing.
FreshRSS/FreshRSS,marienfressinaud/FreshRSS,FreshRSS/FreshRSS,marienfressinaud/FreshRSS,FreshRSS/FreshRSS,FreshRSS/FreshRSS,aledeg/FreshRSS,marienfressinaud/FreshRSS,aledeg/FreshRSS,marienfressinaud/FreshRSS,Alkarex/FreshRSS,Alkarex/FreshRSS,Alkarex/FreshRSS,aledeg/FreshRSS,aledeg/FreshRSS,Alkarex/FreshRSS