Update Update scalikejdbc-mapper-generator version.

[SAMMY7th]

#11.

It was caused by a mixture of plug-ins of multiple versions.
scalikejdbc-play-fixture depends on scalikeJDBC 2.5.2 .
But, scalikejdbc-mapper-generator depends on 2.4.2.

• errorlog.txt

Update scalike-jdbc-mapper version 2.4.2 to 2.5.2.

[seratch]

Thanks, LGTM.

We should have set up TravisCI but we've finished it yet. #15

Let me merge this. I confirmed the actual behavior in person at ScalaMatsuri 2018.