Cross building for sbt 0.12/13

I have a problem with this. 
Now I reduced project dependecies to `sbt-s3-resolver` and our fork of [`sbt-release`](https://github.com/ohnosequences/sbt-release). Both are successfully published for `_2.9.2_0.12` and `_2.10_0.13`.

Now, I try to repeat the trick for this `sbt-statika` plugin. Ok, I tried with `sbt-cross-building`, but it may be not so robust thing, but even when I just set 
``` scala
scalaVersion := "2.10.2"

sbtVersion := "0.13.0"
```

it searches for the wrong artifact:
```
$ sbt
> sbt-version
[info] 0.13.0
> compile
[info] Resolving ohnosequences#sbt-release;0.8-SNAPSHOT ...
[warn] 	module not found: ohnosequences#sbt-release;0.8-SNAPSHOT
...
[warn] 	::::::::::::::::::::::::::::::::::::::::::::::
[warn] 	::          UNRESOLVED DEPENDENCIES         ::
[warn] 	::::::::::::::::::::::::::::::::::::::::::::::
[warn] 	:: ohnosequences#sbt-release;0.8-SNAPSHOT: not found
[warn] 	::::::::::::::::::::::::::::::::::::::::::::::
[warn]
[warn] 	Note: Some unresolved dependencies have extra attributes.  Check that these dependencies exist with the requested attributes.
[warn] 		ohnosequences:sbt-release:0.8-SNAPSHOT (sbtVersion=0.12, scalaVersion=2.10)
[warn]
```

Why `sbtVersion` is `0.12`???