add missing eol at eof (POSIX compliance)

According to the POSIX standard a line is defined as follows:

```

A sequence of zero or more non-<newline> characters plus a terminating <newline> character.
```

/ref https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/V1_chap03.html#tag_03_206

migrations/sqlite/2018-01-14-171611_create_tables/up.sql

@@ -59,4 +59,3 @@ CREATE TABLE folders (
   user_uuid  TEXT     NOT NULL REFERENCES users (uuid),
   name       TEXT     NOT NULL
 );
-