Update dbmigrate-lib mysql version

[mentalbrew]

Build is failing on stable Rust (1.20.0):

error: type `io::IoPack + 'static` is private
    --> /home/mentalbrew/.cargo/registry/src/github.com-1ecc6299db9ec823/mysql-10.0.0/src/conn/mod.rs:1044:30
     |
1044 |         let (data, seq_id) = self.get_mut_stream().as_mut().read_packet(old_seq_id)?;
     |                              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

error: type `io::IoPack + 'static` is private
    --> /home/mentalbrew/.cargo/registry/src/github.com-1ecc6299db9ec823/mysql-10.0.0/src/conn/mod.rs:1051:22
     |
1051 |         let seq_id = self.get_mut_stream().as_mut().drop_packet(old_seq_id)?;
     |                      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

error: type `io::IoPack + 'static` is private
    --> /home/mentalbrew/.cargo/registry/src/github.com-1ecc6299db9ec823/mysql-10.0.0/src/conn/mod.rs:1059:23
     |
1059 |         self.seq_id = self.get_mut_stream().as_mut().write_packet(data, seq_id, max_allowed_packet)?;
     |                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

error: aborting due to 3 previous errors

Searching for this error revealed this support issue for the compiler:
rust-lang/rust#43662

The simplest path seems to be upgrading to a newer version of mysql crate. Is there any issue with doing so?

[Keats]

I've noticed that yesterday but didn't have time to fix it yet. There shouldn't be any issue upgrading mysql, i'll take a PR for it or I'll do it today/this weekend.

[Keats]

Just pushed a new version to crates.io that should fix the issue!

[mentalbrew]

Thank you! By the time I was available to work on it, you already had the fix in. Much appreciated!